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add Bosun, cadvisor, Kubernetes; Icinga description. fixes #105

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Remove some unneccessary spaces, instead add indentation.
harr harr, now this repo is incompatible with kahun's.
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## Automation
*Automation build.*
* [Apache Ant](https://ant.apache.org/) - Automation build tool, similar to make, written in Java.
* [Apache Maven](http://maven.apache.org/) - Build automation tool mainly for Java.
* [Bazel](http://bazel.io/) - Google's build system.
* [GNU Make](http://www.gnu.org/software/make/) - The most popular automation build tool for many purposes.
* [Gradle](http://gradle.org/) - Another build automation system.
* [Rake](https://github.com/ruby/rake) - Build automation tool similar to Make, written in and extensible in Ruby.
* [Apache Ant](https://ant.apache.org/) - Automation build tool, similar to make, written in Java.
* [Apache Maven](http://maven.apache.org/) - Build automation tool mainly for Java.
* [Bazel](http://bazel.io/) - Google's build system.
* [GNU Make](http://www.gnu.org/software/make/) - The most popular automation build tool for many purposes.
* [Gradle](http://gradle.org/) - Another build automation system.
* [Rake](https://github.com/ruby/rake) - Build automation tool similar to Make, written in and extensible in Ruby.
## Backups
*Backup software.*
* [Amanda](http://www.amanda.org/) - Client-server model backup tool.
* [Attic](https://attic-backup.org) - A deduplicating backup program written in Python.
* [Bareos](http://www.bareos.org) - A fork of Bacula backup tool.
* [Backupninja](https://labs.riseup.net/code/projects/backupninja) - Lightweight, extensible meta-backup system.
* [Brebis](http://brebisproject.org) - A fully automated backup checker
* [Burp](http://burp.grke.org/) - Network backup and restore program.
* [Duplicity](http://duplicity.nongnu.org/) - Encrypted bandwidth-efficient backup using the rsync algorithm.
* [Elkarbackup](https://github.com/elkarbackup/elkarbackup) - Backup solution based on RSnapshot with a simple web interface
* [Lsyncd](https://github.com/axkibe/lsyncd) - File Monitor which spawns a process to synchronize the changes (rsync by default).
* [Obnam](http://obnam.org/) - An easy, secure, snapshots-based backup program with data de-duplication.
* [Rdiff-backup](http://www.nongnu.org/rdiff-backup/) - An easy A remote incremental backup of all your files.
* [Rsnapshot](http://www.rsnapshot.org/) - Filesystem Snapshotting Utility.
* [Snebu](http://www.snebu.com/) – Snapshot backup with global multi-client deduplication and transparent compression.
* [UrBackup](http://www.urbackup.org/) - Another client-server backup system.
* [DREBS](https://github.com/dojo4/drebs) - AWS EBS backup script that supports strategies.
* [ZBackup](http://zbackup.org/) - A versatile deduplicating backup tool.
* [Amanda](http://www.amanda.org/) - Client-server model backup tool.
* [Attic](https://attic-backup.org) - A deduplicating backup program written in Python.
* [Bareos](http://www.bareos.org) - A fork of Bacula backup tool.
* [Backupninja](https://labs.riseup.net/code/projects/backupninja) - Lightweight, extensible meta-backup system.
* [Brebis](http://brebisproject.org) - A fully automated backup checker
* [Burp](http://burp.grke.org/) - Network backup and restore program.
* [Duplicity](http://duplicity.nongnu.org/) - Encrypted bandwidth-efficient backup using the rsync algorithm.
* [Elkarbackup](https://github.com/elkarbackup/elkarbackup) - Backup solution based on RSnapshot with a simple web interface
* [Lsyncd](https://github.com/axkibe/lsyncd) - File Monitor which spawns a process to synchronize the changes (rsync by default).
* [Obnam](http://obnam.org/) - An easy, secure, snapshots-based backup program with data de-duplication.
* [Rdiff-backup](http://www.nongnu.org/rdiff-backup/) - An easy A remote incremental backup of all your files.
* [Rsnapshot](http://www.rsnapshot.org/) - Filesystem Snapshotting Utility.
* [Snebu](http://www.snebu.com/) – Snapshot backup with global multi-client deduplication and transparent compression.
* [UrBackup](http://www.urbackup.org/) - Another client-server backup system.
* [DREBS](https://github.com/dojo4/drebs) - AWS EBS backup script that supports strategies.
* [ZBackup](http://zbackup.org/) - A versatile deduplicating backup tool.
## Build and software organization tools
*Build and software organization tools.*
* [EasyBuild](https://easybuild.readthedocs.org/en/latest/) - EasyBuild builds software and modulefiles for High Performance Computing (HPC) systems in an efficient way.
* [environment-modules Lmod](https://www.tacc.utexas.edu/research-development/tacc-projects/lmod) - Lmod is a Lua based module system that easily handles the MODULEPATH Hierarchical problem.
* [HPCBIOS](hpcbios.readthedocs.org/en/latest/) - HPCBIOS is an effort to setup a common, well-documented and reproducible, environment spanning across multiple HPC systems & sites, *inclusive* of documentation.
* [EasyBuild](https://easybuild.readthedocs.org/en/latest/) - EasyBuild builds software and modulefiles for High Performance Computing (HPC) systems in an efficient way.
* [environment-modules Lmod](https://www.tacc.utexas.edu/research-development/tacc-projects/lmod) - Lmod is a Lua based module system that easily handles the MODULEPATH Hierarchical problem.
* [HPCBIOS](hpcbios.readthedocs.org/en/latest/) - HPCBIOS is an effort to setup a common, well-documented and reproducible, environment spanning across multiple HPC systems & sites, *inclusive* of documentation.
## ChatOps
*Conversation-driven development and management. See http://www.reddit.com/r/chatops for more information.*
* [CloudBot](https://github.com/CloudBotIRC/CloudBot) - The simple, fast, expandable Python IRC bot.
* [Eggdrop](http://www.eggheads.org/) - the world's most popular IRC bot, designed for flexibility and ease of use, and is freely distributable under the GNU GPL.
* [Err](http://errbot.net/) - a plugin based chatbot designed to be easily deployable, extensible and maintainable.
* [Hubot](https://hubot.github.com/) - A customizable, life embetterment robot.
* [Lazlo](https://github.com/djosephsen/lazlo) - A chatops automation framework in Go.
* [Lita](https://www.lita.io/) - A robot companion for your company's chat room.
* [CloudBot](https://github.com/CloudBotIRC/CloudBot) - The simple, fast, expandable Python IRC bot.
* [Eggdrop](http://www.eggheads.org/) - the world's most popular IRC bot, designed for flexibility and ease of use, and is freely distributable under the GNU GPL.
* [Err](http://errbot.net/) - a plugin based chatbot designed to be easily deployable, extensible and maintainable.
* [Hubot](https://hubot.github.com/) - A customizable, life embetterment robot.
* [Lazlo](https://github.com/djosephsen/lazlo) - A chatops automation framework in Go.
* [Lita](https://www.lita.io/) - A robot companion for your company's chat room.
## Client management
*Managing software on desktop computers.*
* [OCS Inventory NG](http://www.ocsinventory-ng.org/en/) - Inventory, deployment and network scan.
* [Opsi](http://www.opsi.org/en) (open PC server integration) - Client Management for Windows based on Debian.
* [WAPT](http://dev.tranquil.it/wiki/WAPT_-_apt-get_pour_Windows/en) - Network-wide (un)installation, configuration and upgrades of Windows based software.
* [WPKG](http://wpkg.org/) - Software deployment, upgrade and removal program for Windows.
* [OCS Inventory NG](http://www.ocsinventory-ng.org/en/) - Inventory, deployment and network scan.
* [Opsi](http://www.opsi.org/en) (open PC server integration) - Client Management for Windows based on Debian.
* [WAPT](http://dev.tranquil.it/wiki/WAPT_-_apt-get_pour_Windows/en) - Network-wide (un)installation, configuration and upgrades of Windows based software.
* [WPKG](http://wpkg.org/) - Software deployment, upgrade and removal program for Windows.
## Cloning
*Cloning software.*
* [Clonezilla](http://clonezilla.org/) - Partition and disk imaging/cloning program.
* [Fog](http://www.fogproject.org/) - Another computer cloning solution.
* [Clonezilla](http://clonezilla.org/) - Partition and disk imaging/cloning program.
* [Fog](http://www.fogproject.org/) - Another computer cloning solution.
## Cloud Computing
* [AppScale](http:/github.com/AppScale/appscale) - Cloud software with Google App Engine compatibility.
* [Archipel](http://archipelproject.org/) - Manage and supervise virtual machines using Libvirt.
* [CloudStack](http://cloudstack.apache.org/) - Cloud computing software for creating, managing, and deploying infrastructure cloud services.
* [Cobbler](http://www.cobblerd.org/) - Cobbler is a Linux installation server that allows for rapid setup of network installation environments.
* [Cracow Cloud One - Polish Private Cloud](http://cc1.ifj.edu.pl/) - The CC1 system provides a complete solution for Private Cloud Computing.
* [Eucalyptus](https://www.eucalyptus.com/) - Private cloud software with AWS compatibility.
* [Flynn](https://flynn.io) - PaaS
* [Mesos](http://mesos.apache.org/) - Develop and run resource-efficient distributed systems.
* [OpenNebula](http://opennebula.org/) - User-driven cloud management platform for sysadmins and devops.
* [Openshift](http://www.openshift.org) - PaaS product from Red Hat.
* [OpenStack](https://www.openstack.org/) - Build private and public clouds.
* [The Foreman](http://theforeman.org/) - Complete lifecycle management tool for physical and virtual servers. FOSS.
* [Tsuru](https://tsuru.io) - Tsuru is an extensible Platform as a Service software.
* [AppScale](http:/github.com/AppScale/appscale) - Cloud software with Google App Engine compatibility.
* [Archipel](http://archipelproject.org/) - Manage and supervise virtual machines using Libvirt.
* [CloudStack](http://cloudstack.apache.org/) - Cloud computing software for creating, managing, and deploying infrastructure cloud services.
* [Cobbler](http://www.cobblerd.org/) - Cobbler is a Linux installation server that allows for rapid setup of network installation environments.
* [Cracow Cloud One - Polish Private Cloud](http://cc1.ifj.edu.pl/) - The CC1 system provides a complete solution for Private Cloud Computing.
* [Eucalyptus](https://www.eucalyptus.com/) - Private cloud software with AWS compatibility.
* [Flynn](https://flynn.io) - PaaS
* [Mesos](http://mesos.apache.org/) - Develop and run resource-efficient distributed systems.
* [OpenNebula](http://opennebula.org/) - User-driven cloud management platform for sysadmins and devops.
* [Openshift](http://www.openshift.org) - PaaS product from Red Hat.
* [OpenStack](https://www.openstack.org/) - Build private and public clouds.
* [The Foreman](http://theforeman.org/) - Complete lifecycle management tool for physical and virtual servers. FOSS.
* [Tsuru](https://tsuru.io) - Tsuru is an extensible Platform as a Service software.
## Cloud Orchestration
* [BOSH](http://docs.cloudfoundry.org/bosh/) - IaaS orchestration platform originally written for deploying and managing Cloud Foundry PaaS, but also useful for general purpose distributed systems.
* [Cloudify](http://www.getcloudify.org/) - TOSCA-based cloud orchestration software platform written in Python and YAML.
* [CloudSlang](http://www.cloudslang.io/) - Flow-based orchestration tool for managing deployed applications, with Docker capabilities.
* [Juju](https://juju.ubuntu.com/) - Cloud orchestration tool which manages services as charms, YAML configuration and deployment script bundles.
* [MCollective](http://puppetlabs.com/mcollective) - Ruby framework to manage server orchestration, developed by Puppet labs.
* [Overcast](http://andrewchilds.github.io/overcast/) - Deploy VMs across different cloud providers, and run commands and scripts across any or all of them in parallel via SSH.
* [Rundeck](http://rundeck.org/) - Simple orchestration tool.
* [Salt](http://www.saltstack.com/) - Fast, scalable and flexible systems management software written in Python/ZeroMQ.
* [StackStorm](http://stackstorm.com/) - Event Driven Operations and ChatOps platform for infrastructure management. Written in Python
* [BOSH](http://docs.cloudfoundry.org/bosh/) - IaaS orchestration platform originally written for deploying and managing Cloud Foundry PaaS, but also useful for general purpose distributed systems.
* [Cloudify](http://www.getcloudify.org/) - TOSCA-based cloud orchestration software platform written in Python and YAML.
* [CloudSlang](http://www.cloudslang.io/) - Flow-based orchestration tool for managing deployed applications, with Docker capabilities.
* [Juju](https://juju.ubuntu.com/) - Cloud orchestration tool which manages services as charms, YAML configuration and deployment script bundles.
* [Kubernetes](http://kubernetes.io/) - Orchestration system for Docker containers - ([Source Code](https://github.com/kubernetes/kubernetes), [Documentation](http://kubernetes.io/v1.0/)) `Apache` `Go`
* [MCollective](http://puppetlabs.com/mcollective) - Ruby framework to manage server orchestration, developed by Puppet labs.
* [Overcast](http://andrewchilds.github.io/overcast/) - Deploy VMs across different cloud providers, and run commands and scripts across any or all of them in parallel via SSH.
* [Rundeck](http://rundeck.org/) - Simple orchestration tool.
* [Salt](http://www.saltstack.com/) - Fast, scalable and flexible systems management software written in Python/ZeroMQ.
* [StackStorm](http://stackstorm.com/) - Event Driven Operations and ChatOps platform for infrastructure management. Written in Python
## Cloud Storage
* [git-annex assistant](http://git-annex.branchable.com/assistant/) - A synchronised folder on each of your OSX and Linux computers, Android devices, removable drives, NAS appliances, and cloud services.
* [ownCloud](https://owncloud.org) - Provides universal access to your files via the web, your computer or your mobile devices.
* [Pydio](https://pyd.io) - Pydio (formerly AjaXplorer) is a mature solution for file sharing and synchronization.
* [Seafile](http://seafile.com) - Another Cloud Storage solution.
* [SparkleShare](http://sparkleshare.org/) - Provides cloud storage and file synchronization services. By default, it uses Git as a storage backend.
* [Swift](http://docs.openstack.org/developer/swift/) - A highly available, distributed, eventually consistent object/blob store.
* [Syncthing](http://syncthing.net/) - System for private, encrypted and authenticated distribution of data.
* [git-annex assistant](http://git-annex.branchable.com/assistant/) - A synchronised folder on each of your OSX and Linux computers, Android devices, removable drives, NAS appliances, and cloud services.
* [ownCloud](https://owncloud.org) - Provides universal access to your files via the web, your computer or your mobile devices.
* [Pydio](https://pyd.io) - Pydio (formerly AjaXplorer) is a mature solution for file sharing and synchronization.
* [Seafile](http://seafile.com) - Another Cloud Storage solution.
* [SparkleShare](http://sparkleshare.org/) - Provides cloud storage and file synchronization services. By default, it uses Git as a storage backend.
* [Swift](http://docs.openstack.org/developer/swift/) - A highly available, distributed, eventually consistent object/blob store.
* [Syncthing](http://syncthing.net/) - System for private, encrypted and authenticated distribution of data.
## Code Review
*Web Based collaborative code review system.*
* [Gerrit](https://www.gerritcodereview.com/) - Based on the Git version control, it facilitates software developers to review modifications to the source code and approve or reject those changes.
* [Phabricator](http://phabricator.org/) - Code review tool build by facebook and used by WikiMedia, FB, dropbox etc. Comes with an integrated wiki, bug tracker, VC integration and a CLI tool called arcanist.
* [Review Board](https://www.reviewboard.org/) - Available as free software under the MIT License.
* [Gerrit](https://www.gerritcodereview.com/) - Based on the Git version control, it facilitates software developers to review modifications to the source code and approve or reject those changes.
* [Phabricator](http://phabricator.org/) - Code review tool build by facebook and used by WikiMedia, FB, dropbox etc. Comes with an integrated wiki, bug tracker, VC integration and a CLI tool called arcanist.
* [Review Board](https://www.reviewboard.org/) - Available as free software under the MIT License.
## Collaborative Software
*Collaborative software or groupware suites.*
* [Citadel/UX](http://www.citadel.org/) - Collaboration suite (messaging and groupware) that is descended from the Citadel family of programs.
* [EGroupware](http://www.egroupware.org/) - Groupware software written in PHP.
* [Horde Groupware](http://www.horde.org/apps/groupware) - PHP based collaborative software suite that includes email, calendars, wikis, time tracking and file management.
* [Kolab](https://www.kolab.org) - Another groupware suite.
* [SOGo](https://www.sogo.nu/) - Collaborative software server with a focus on simplicity and scalability.
* [Zimbra](https://www.zimbra.com/community/) - Collaborative software suite, that includes an email server and web client.
* [Citadel/UX](http://www.citadel.org/) - Collaboration suite (messaging and groupware) that is descended from the Citadel family of programs.
* [EGroupware](http://www.egroupware.org/) - Groupware software written in PHP.
* [Horde Groupware](http://www.horde.org/apps/groupware) - PHP based collaborative software suite that includes email, calendars, wikis, time tracking and file management.
* [Kolab](https://www.kolab.org) - Another groupware suite.
* [SOGo](https://www.sogo.nu/) - Collaborative software server with a focus on simplicity and scalability.
* [Zimbra](https://www.zimbra.com/community/) - Collaborative software suite, that includes an email server and web client.
## Configuration Management Database
*Configuration management database (CMDB) software.*
* [i-doit](http://www.i-doit.org/) - IT Documentation and CMDB.
* [iTop](http://www.combodo.com/-Overview-.html) - Complete ITIL web based service management tool.
* [Ralph](https://github.com/allegro/ralph) - Asset management, DCIM and CMDB system for large Data Centers as well as smaller LAN networks.
* [Clusto](https://github.com/clusto/clusto) - Helps you keep track of your inventory, where it is, how it's connected, and provides an abstracted interface for interacting with the elements of the infrastructure.
* [Collins](http://tumblr.github.io/collins) - At Tumblr, it's the infrastructure source of truth and knowledge.
* [i-doit](http://www.i-doit.org/) - IT Documentation and CMDB.
* [iTop](http://www.combodo.com/-Overview-.html) - Complete ITIL web based service management tool.
* [Ralph](https://github.com/allegro/ralph) - Asset management, DCIM and CMDB system for large Data Centers as well as smaller LAN networks.
* [Clusto](https://github.com/clusto/clusto) - Helps you keep track of your inventory, where it is, how it's connected, and provides an abstracted interface for interacting with the elements of the infrastructure.
* [Collins](http://tumblr.github.io/collins) - At Tumblr, it's the infrastructure source of truth and knowledge.
## Configuration Management
*Configuration management tools.*
* [Ansible](http://www.ansibleworks.com/) - It's written in Python and manages the nodes over SSH.
* [CFEngine](http://cfengine.com/) - Lightweight agent system. Configuration state is specified via a declarative language.
* [Chef](http://www.opscode.com/chef/) - It's written in Ruby and Erlang and uses a pure-Ruby DSL.
* [Pallet](http://palletops.com/) - Infrastructure definition, configuration and management via a Clojure DSL.
* [Puppet](http://puppetlabs.com/) - It's written in Ruby and uses Puppet's declarative language or a Ruby DSL.
* [Salt](http://www.saltstack.com/) - It's written in Python.
* [Slaughter](http://steve.org.uk/Software/slaughter/) - It's written in Perl.
* [Ansible](http://www.ansibleworks.com/) - It's written in Python and manages the nodes over SSH.
* [CFEngine](http://cfengine.com/) - Lightweight agent system. Configuration state is specified via a declarative language.
* [Chef](http://www.opscode.com/chef/) - It's written in Ruby and Erlang and uses a pure-Ruby DSL.
* [Pallet](http://palletops.com/) - Infrastructure definition, configuration and management via a Clojure DSL.
* [Puppet](http://puppetlabs.com/) - It's written in Ruby and uses Puppet's declarative language or a Ruby DSL.
* [Salt](http://www.saltstack.com/) - It's written in Python.
* [Slaughter](http://steve.org.uk/Software/slaughter/) - It's written in Perl.
## Continuous Integration & Continuous Deployment
*Continuous integration/deployment software.*
* [Buildbot](http://buildbot.net/) - Python-based toolkit for continuous integration.
* [Drone](https://github.com/drone/drone) - Continuous integration server built on Docker and configured using YAML files.
* [GitLab CI](https://www.gitlab.com/gitlab-ci/) - Based off of ruby. They also provide GitLab, which manages git repositories.
* [Go](http://www.go.cd/) - Continuous delivery server.
* [Jenkins](http://jenkins-ci.org/) - An extendable continuous integration server.
* [Buildbot](http://buildbot.net/) - Python-based toolkit for continuous integration.
* [Drone](https://github.com/drone/drone) - Continuous integration server built on Docker and configured using YAML files.
* [GitLab CI](https://www.gitlab.com/gitlab-ci/) - Based off of ruby. They also provide GitLab, which manages git repositories.
* [Go](http://www.go.cd/) - Continuous delivery server.
* [Jenkins](http://jenkins-ci.org/) - An extendable continuous integration server.
## Control Panels
*Web hosting and server or service control panels*
* Web hosting
* [Froxlor](http://www.froxlor.org/) - Easy to use panel for Linux with Nginx and PHP-FPM support.
* [ISPConfig](http://www.ispconfig.org) - Hosting control panel for Linux.
* [Sentora](http://sentora.org/) - Control panel for Linux, BSD, and Windows based on ZPanel.
* [VestaCP](http://www.vestacp.com/) - Hosting panel for Linux but with Nginx.
* DNS
* [Atomia DNS](http://atomiadns.com/) - DNS management system.
* [PDNS Gui](https://github.com/odoucet/pdns-gui) - WebGUI which aids in administering domains and records for PowerDNS with MySQL.
* [Poweradmin](http://www.poweradmin.org/) - Friendly web-based DNS administration tool for PowerDNS server.
* Revision Control
* [iF.SVNAdmin](http://svnadmin.insanefactory.com/) - WebGUI to manage Subversion repositories and User/Group permissions.
* [SCM-Manager](https://www.scm-manager.org/) - The easiest way to share and manage your Git, Mercurial and Subversion repositories.
* [WebSVN](http://www.websvn.info/) - Opensource web subversion repository browser.
* Virtualization
* [Feathur](http://feathur.com) - VPS Provisioning and Management Software.
* [Panamax](http://panamax.io/) - Project that makes deploying complex containerized apps as easy as Drag-and-Drop.
* [OpenVZ Web Panel](http://owp.softunity.com.ru/) - Web panel to control your OpenVZ servers.
* [Virtkick](https://www.virtkick.com/) - A simple orchestrator. Manage virtual machines or Docker containers easily.
* [WebVirtMgr](https://retspen.github.io) - libvirt-based Web interface for managing virtual machines.
* Server
* [Ajenti](http://ajenti.org/) - Control panel for Linux and BSD.
* [Cockpit](http://cockpit-project.org/) - New multi-server web interface for Linux servers written in C.
* [Virtualmin](http://www.virtualmin.com/) - Control panel for Linux based on webmin.
* [Webmin](http://www.webmin.com/) - Linux server control panel.
* Others
* Web hosting
* [Froxlor](http://www.froxlor.org/) - Easy to use panel for Linux with Nginx and PHP-FPM support.
* [ISPConfig](http://www.ispconfig.org) - Hosting control panel for Linux.
* [Sentora](http://sentora.org/) - Control panel for Linux, BSD, and Windows based on ZPanel.
* [VestaCP](http://www.vestacp.com/) - Hosting panel for Linux but with Nginx.
* DNS
* [Atomia DNS](http://atomiadns.com/) - DNS management system.
* [PDNS Gui](https://github.com/odoucet/pdns-gui) - WebGUI which aids in administering domains and records for PowerDNS with MySQL.
* [Poweradmin](http://www.poweradmin.org/) - Friendly web-based DNS administration tool for PowerDNS server.
* Revision Control
* [iF.SVNAdmin](http://svnadmin.insanefactory.com/) - WebGUI to manage Subversion repositories and User/Group permissions.
* [SCM-Manager](https://www.scm-manager.org/) - The easiest way to share and manage your Git, Mercurial and Subversion repositories.
* [WebSVN](http://www.websvn.info/) - Opensource web subversion repository browser.
* Virtualization
* [Feathur](http://feathur.com) - VPS Provisioning and Management Software.
* [Panamax](http://panamax.io/) - Project that makes deploying complex containerized apps as easy as Drag-and-Drop.
* [OpenVZ Web Panel](http://owp.softunity.com.ru/) - Web panel to control your OpenVZ servers.
* [Virtkick](https://www.virtkick.com/) - A simple orchestrator. Manage virtual machines or Docker containers easily.
* [WebVirtMgr](https://retspen.github.io) - libvirt-based Web interface for managing virtual machines.
* Server
* [Ajenti](http://ajenti.org/) - Control panel for Linux and BSD.
* [Cockpit](http://cockpit-project.org/) - New multi-server web interface for Linux servers written in C.
* [Virtualmin](http://www.virtualmin.com/) - Control panel for Linux based on webmin.
* [Webmin](http://www.webmin.com/) - Linux server control panel.
* Others
## Deployment Automation
*Tools and scripts to support deployments to your servers.*
* [Capistrano](http://www.capistranorb.com) - Deploy your application to any number of machines simultaneously, in sequence or as a rolling set via SSH (rake based).
* [Fabric](http://www.fabfile.org/) - Python library and cli tool for streamlining the use of SSH for application deployment or systems administration tasks.
* [Mina](http://nadarei.co/mina/) - Really fast deployer and server automation tool (rake based).
* [Rocketeer](http://rocketeer.autopergamene.eu/) - PHP task runner and deployment tool.
* [Vlad the Deployer](http://rubyhitsquad.com/Vlad_the_Deployer.html) - Deployment automation (rake based).
* [Capistrano](http://www.capistranorb.com) - Deploy your application to any number of machines simultaneously, in sequence or as a rolling set via SSH (rake based).
* [Fabric](http://www.fabfile.org/) - Python library and cli tool for streamlining the use of SSH for application deployment or systems administration tasks.
* [Mina](http://nadarei.co/mina/) - Really fast deployer and server automation tool (rake based).
* [Rocketeer](http://rocketeer.autopergamene.eu/) - PHP task runner and deployment tool.
* [Vlad the Deployer](http://rubyhitsquad.com/Vlad_the_Deployer.html) - Deployment automation (rake based).
## Distributed Filesystems
*Network distributed filesystems.*
* [Ceph](http://ceph.com/) - Distributed object store and file system.
* [DRBD](http://www.drbd.org/) - Distributed Replicated Block Device.
* [LeoFS](http://leo-project.net) - Unstructured object/data storage and a highly available, distributed, eventually consistent storage system.
* [GlusterFS](http://www.gluster.org/) - Scale-out network-attached storage file system.
* [HDFS](http://hadoop.apache.org/) - Distributed, scalable, and portable file-system written in Java for the Hadoop framework.
* [Lustre](http://lustre.opensfs.org/) - Parallel distributed file system, generally used for large-scale cluster computing.
* [MooseFS](http://www.moosefs.org/) - Fault tolerant, network distributed file system.
* [MogileFS](http://mogilefs.org/) - Application level, network distributed file system.
* [OpenAFS](http://www.openafs.org/) - Distributed network file system with read-only replicas and multi-OS support.
* [TahoeLAFS](https://tahoe-lafs.org/trac/tahoe-lafs) - secure, decentralized, fault-tolerant, peer-to-peer distributed data store and distributed file system.
* [XtreemFS](http://www.xtreemfs.org/) - XtreemFS is a fault-tolerant distributed file system for all storage needs.
* [Ceph](http://ceph.com/) - Distributed object store and file system.
* [DRBD](http://www.drbd.org/) - Distributed Replicated Block Device.
* [LeoFS](http://leo-project.net) - Unstructured object/data storage and a highly available, distributed, eventually consistent storage system.
* [GlusterFS](http://www.gluster.org/) - Scale-out network-attached storage file system.
* [HDFS](http://hadoop.apache.org/) - Distributed, scalable, and portable file-system written in Java for the Hadoop framework.
* [Lustre](http://lustre.opensfs.org/) - Parallel distributed file system, generally used for large-scale cluster computing.
* [MooseFS](http://www.moosefs.org/) - Fault tolerant, network distributed file system.
* [MogileFS](http://mogilefs.org/) - Application level, network distributed file system.
* [OpenAFS](http://www.openafs.org/) - Distributed network file system with read-only replicas and multi-OS support.
* [TahoeLAFS](https://tahoe-lafs.org/trac/tahoe-lafs) - secure, decentralized, fault-tolerant, peer-to-peer distributed data store and distributed file system.
* [XtreemFS](http://www.xtreemfs.org/) - XtreemFS is a fault-tolerant distributed file system for all storage needs.
## DNS
*DNS servers.*
* [Bind](https://www.isc.org/downloads/bind/) - The most widely used name server software.
* [djbdns](http://cr.yp.to/djbdns.html) - A collection of DNS applications, including tinydns.
* [Designate](https://wiki.openstack.org/wiki/Designate) - DNS REST API that support several DNS servers as its backend.
* [dnsmasq](http://www.thekelleys.org.uk/dnsmasq/doc.html) - A lightweight service providing DNS, DHCP and TFTP services to small-scale networks.
* [Knot](https://www.knot-dns.cz/) - High performance authoritative-only DNS server.
* [NSD](http://www.nlnetlabs.nl/projects/nsd/) - Authoritative only, high performance, simple name server.
* [PowerDNS](https://www.powerdns.com/) - DNS server with a variety of data storage back-ends and load balancing features.
* [Unbound](http://unbound.net/) - Validating, recursive, and caching DNS resolver.
* [Yadifa](http://yadifa.eu/) - Lightweight authoritative Name Server with DNSSEC capabilities powering the .eu top-level domain.
* [Bind](https://www.isc.org/downloads/bind/) - The most widely used name server software.
* [djbdns](http://cr.yp.to/djbdns.html) - A collection of DNS applications, including tinydns.
* [Designate](https://wiki.openstack.org/wiki/Designate) - DNS REST API that support several DNS servers as its backend.
* [dnsmasq](http://www.thekelleys.org.uk/dnsmasq/doc.html) - A lightweight service providing DNS, DHCP and TFTP services to small-scale networks.
* [Knot](https://www.knot-dns.cz/) - High performance authoritative-only DNS server.
* [NSD](http://www.nlnetlabs.nl/projects/nsd/) - Authoritative only, high performance, simple name server.
* [PowerDNS](https://www.powerdns.com/) - DNS server with a variety of data storage back-ends and load balancing features.
* [Unbound](http://unbound.net/) - Validating, recursive, and caching DNS resolver.
* [Yadifa](http://yadifa.eu/) - Lightweight authoritative Name Server with DNSSEC capabilities powering the .eu top-level domain.
## Editors
*Open source code editors.*
* [Atom](https://atom.io/) - A hackable text editor from Github.
* [Brackets](http://brackets.io/) - Code editor for web designers and front-end developers.
* [Eclipse](http://eclipse.org/) - IDE written in Java with an extensible plug-in system.
* [Geany](http://www.geany.org/) - GTK2 text editor.
* [GNU Emacs](http://www.gnu.org/software/emacs/) - An extensible, customizable text editor-and more.
* [Haroopad](http://pad.haroopress.com/) - Markdown editor with live preview.
* [ICEcoder](http://icecoder.net) - Code editor awesomeness, built with common web languages.
* [jotgit](https://github.com/jdleesmiller/jotgit) - Git-backed real-time collaborative code editing.
* [KDevelop](https://www.kdevelop.org/) - IDE by the people behind KDE.
* [Light Table](http://www.lighttable.com/) - The next generation code editor.
* [Lime](http://limetext.org/) - Aims to provide an open source solution to Sublime Text
* [TextMate](https://github.com/textmate/textmate/) - A graphical text editor for OS X.
* [Vim](http://www.vim.org) - A highly configurable text editor built to enable efficient editing.
* [Nano](http://nano-editor.org) - Easy to use, customizable text editor.
* [Atom](https://atom.io/) - A hackable text editor from Github.
* [Brackets](http://brackets.io/) - Code editor for web designers and front-end developers.
* [Eclipse](http://eclipse.org/) - IDE written in Java with an extensible plug-in system.
* [Geany](http://www.geany.org/) - GTK2 text editor.
* [GNU Emacs](http://www.gnu.org/software/emacs/) - An extensible, customizable text editor-and more.
* [Haroopad](http://pad.haroopress.com/) - Markdown editor with live preview.
* [ICEcoder](http://icecoder.net) - Code editor awesomeness, built with common web languages.
* [jotgit](https://github.com/jdleesmiller/jotgit) - Git-backed real-time collaborative code editing.
* [KDevelop](https://www.kdevelop.org/) - IDE by the people behind KDE.
* [Light Table](http://www.lighttable.com/) - The next generation code editor.
* [Lime](http://limetext.org/) - Aims to provide an open source solution to Sublime Text
* [TextMate](https://github.com/textmate/textmate/) - A graphical text editor for OS X.
* [Vim](http://www.vim.org) - A highly configurable text editor built to enable efficient editing.
* [Nano](http://nano-editor.org) - Easy to use, customizable text editor.
## Identity Management
*LDAP servers and other tools to manage accounts and identities.*
### LDAP
* [389 Directory Server](http://port389.org) - Developed by Red Hat.
* [Apache Directory Server](http://directory.apache.org/) - Apache Software Foundation project written in Java.
* [OpenDJ](http://opendj.forgerock.org/) - Fork of OpenDS.
* [OpenDS](https://opends.java.net/) - Another directory server written in Java.
* [OpenLDAP](http://openldap.org/) - Developed by the OpenLDAP Project.
* [389 Directory Server](http://port389.org) - Developed by Red Hat.
* [Apache Directory Server](http://directory.apache.org/) - Apache Software Foundation project written in Java.
* [OpenDJ](http://opendj.forgerock.org/) - Fork of OpenDS.
* [OpenDS](https://opends.java.net/) - Another directory server written in Java.
* [OpenLDAP](http://openldap.org/) - Developed by the OpenLDAP Project.
### Tools and web interfaces
* [Fusion Directory](http://www.fusiondirectory.org) - Improve the Management of the services and the company directory based on OpenLDAP.
* [FreeIPA](http://www.freeipa.org/) - Security management solution, can manage LDAP, KRB, DNS, sudo, and more
* [LDAP Account Manager (LAM)](https://www.ldap-account-manager.org/lamcms/) - Web frontend for managing entries (e.g. users, groups, DHCP settings) stored in an LDAP directory.
* [Samba](https://www.samba.org/) – Active Directory and CIFS protocol implementation.
* [Fusion Directory](http://www.fusiondirectory.org) - Improve the Management of the services and the company directory based on OpenLDAP.
* [FreeIPA](http://www.freeipa.org/) - Security management solution, can manage LDAP, KRB, DNS, sudo, and more
* [LDAP Account Manager (LAM)](https://www.ldap-account-manager.org/lamcms/) - Web frontend for managing entries (e.g. users, groups, DHCP settings) stored in an LDAP directory.
* [Samba](https://www.samba.org/) – Active Directory and CIFS protocol implementation.
## IT Asset Management
*IT Assets Management software.*
* [GLPI](http://www.glpi-project.org/spip.php?lang=en) - Information Resource-Manager with an additional Administration Interface.
* [OCS Inventory NG](http://www.ocsinventory-ng.org/en/) - Enables users to inventory their IT assets.
* [RackTables](http://racktables.org/) - Datacenter and server room asset management like document hardware assets, network addresses, space in racks, networks configuration.
* [Ralph](https://github.com/allegro/ralph) - Asset management, DCIM and CMDB system for large Data Centers as well as smaller LAN networks.
* [Snipe IT](http://snipeitapp.com/) - Asset & license management software.
* [GLPI](http://www.glpi-project.org/spip.php?lang=en) - Information Resource-Manager with an additional Administration Interface.
* [OCS Inventory NG](http://www.ocsinventory-ng.org/en/) - Enables users to inventory their IT assets.
* [RackTables](http://racktables.org/) - Datacenter and server room asset management like document hardware assets, network addresses, space in racks, networks configuration.
* [Ralph](https://github.com/allegro/ralph) - Asset management, DCIM and CMDB system for large Data Centers as well as smaller LAN networks.
* [Snipe IT](http://snipeitapp.com/) - Asset & license management software.
## Log Management
*Log management tools: collect, parse, visualize ...*
* [Elasticsearch](http://www.elasticsearch.org/) - A Lucene Based Document store mainly used for log indexing, storage and analysis.
* [Fluentd](http://www.fluentd.org/) - Log Collector and Shipper.
* [Flume](https://flume.apache.org/) - Distributed log collection and aggregation system.
* [Graylog2](http://graylog2.org/) - Pluggable Log and Event Analysis Server with Alerting options.
* [Heka](http://hekad.readthedocs.org/en/latest/) - Stream processing system which may be used for log aggregation.
* [Kibana](http://www.elasticsearch.org/overview/kibana/) - Visualize logs and time-stamped data.
* [Logstash](http://logstash.net/) - Tool for managing events and logs.
* [Octopussy](http://www.octopussy.pm) - Log Management Solution (Visualize / Alert / Report).
* [Elasticsearch](http://www.elasticsearch.org/) - A Lucene Based Document store mainly used for log indexing, storage and analysis.
* [Fluentd](http://www.fluentd.org/) - Log Collector and Shipper.
* [Flume](https://flume.apache.org/) - Distributed log collection and aggregation system.
* [Graylog2](http://graylog2.org/) - Pluggable Log and Event Analysis Server with Alerting options.
* [Heka](http://hekad.readthedocs.org/en/latest/) - Stream processing system which may be used for log aggregation.
* [Kibana](http://www.elasticsearch.org/overview/kibana/) - Visualize logs and time-stamped data.
* [Logstash](http://logstash.net/) - Tool for managing events and logs.
* [Octopussy](http://www.octopussy.pm) - Log Management Solution (Visualize / Alert / Report).
## Mail Clients
* [Claws Mail](http://www.claws-mail.org/) - Old school email client (and news reader), based on GTK+.
* [Mutt](http://www.mutt.org/) - Small but very powerful text-based mail client.
* [Thunderbird](https://www.mozilla.org/de/thunderbird/) - Free email application that's easy to set up and customize.
* [Claws Mail](http://www.claws-mail.org/) - Old school email client (and news reader), based on GTK+.
* [Mutt](http://www.mutt.org/) - Small but very powerful text-based mail client.
* [Thunderbird](https://www.mozilla.org/de/thunderbird/) - Free email application that's easy to set up and customize.
## Mail servers/webmail
@ -347,34 +348,36 @@ See https://github.com/kickball/awesome-selfhosted#email
## Monitoring
*Monitoring software.*
* [Adagios](http://adagios.org/) - Web based Nagios interface for configuration and monitoring (replacement to the standard interface), and a REST interface ([Demo](http://demo.adagios.org/), [SourceCode](https://github.com/opinkerfi/adagios), [Documentation](https://github.com/opinkerfi/adagios/wiki))
* [Alerta](https://github.com/guardian/alerta) - Distributed, scaleable and flexible monitoring system.
* [Cacti](http://www.cacti.net) - Web-based network monitoring and graphing tool.
* [Cabot](http://cabotapp.com/) - Monitoring and alerts, similar to PagerDuty.
* [check_mk](http://mathias-kettner.com/check_mk.html) - Collection of extensions for Nagios.
* [Dash](https://github.com/afaqurk/linux-dash) - A low-overhead monitoring web dashboard for a GNU/Linux machine.
* [Flapjack](http://flapjack.io/) - Monitoring notification routing & event processing system.
* [Icinga](https://www.icinga.org/) - Fork of Nagios.
* [LibreNMS](http://www.librenms.org) - Fully featured network monitoring system that provides a wealth of features and device support.
* [Monit](http://mmonit.com/monit/#home) - Small utility for managing and monitoring Unix systems.
* [Munin](http://munin-monitoring.org/) - Networked resource monitoring tool.
* [Linux Dash](https://github.com/afaqurk/linux-dash) - A simple, low-overhead web dashboard for GNU / Linux. (~1MB) ([Demo](http://linuxdash.afaqtariq.com/))
* [Naemon](http://www.naemon.org/) - Network monitoring tool based on the Nagios 4 core with performance enhancements and new features.
* [Nagios](http://www.nagios.org/) - Computer system, network and infrastructure monitoring software application.
* [Node-Bell](https://github.com/eleme/node-bell) - Real-time anomalies detection for periodic time series, metrics monitor.
* [Observium](http://www.observium.org/) - SNMP monitoring for servers and networking devices. Runs on linux.
* [OMD](http://omdistro.org/) - The Open Monitoring Distribution.
* [PhpSysInfo](https://phpsysinfo.github.io/phpsysinfo/) - A customizable PHP script that displays information about your system nicely
* [Riemann](http://riemann.io/) - Flexible and fast events processor allowing complex events/metrics analysis.
* [Sensu](http://sensuapp.org/) - Monitoring framework.
* [Sentry](https://getsentry.com/) - Application monitoring, event logging and aggregation.
* [ServerStatus BotoX](https://github.com/BotoX/ServerStatus) - Display and monitor your servers statistics in a beatiful way.
* [ServerStatus moejda](https://github.com/mojeda/ServerStatus) - Server Status website script, displays uptime (days), free RAM, free HDD
* [Shinken](http://www.shinken-monitoring.org/) - Another monitoring framework.
* [Thruk](http://www.thruk.org/) - Multibackend monitoring web interface with support for Naemon, Nagios, Icinga and Shinken.
* [Xymon](http://www.xymon.com/) - Network monitoring inspired by Big Brother.
* [Zabbix](http://www.zabbix.com/) - Enterprise-class software for monitoring of networks and applications.
* [Zenoss](http://community.zenoss.org) - Application, server, and network management platform based on Zope.
* [Adagios](http://adagios.org/) - Web based Nagios interface for configuration and monitoring (replacement to the standard interface), and a REST interface ([Demo](http://demo.adagios.org/), [SourceCode](https://github.com/opinkerfi/adagios), [Documentation](https://github.com/opinkerfi/adagios/wiki))
* [Alerta](https://github.com/guardian/alerta) - Distributed, scaleable and flexible monitoring system.
* [Bosun](http://bosun.org/) - Monitoring and alerting system by Stack Exchange ([Source Code](https://github.com/bosun-monitor/bosun), [Documentation](http://bosun.org/quickstart.html)) `MIT` `Go`
* [Cacti](http://www.cacti.net) - Web-based network monitoring and graphing tool.
* [Cabot](http://cabotapp.com/) - Monitoring and alerts, similar to PagerDuty.
* [cadvisor](https://github.com/google/cadvisor) - Analyzes resource usage and performance characteristics of running containers ([Source Code](https://github.com/google/cadvisor)) `Apache` `Go`
* [check_mk](http://mathias-kettner.com/check_mk.html) - Collection of extensions for Nagios.
* [Dash](https://github.com/afaqurk/linux-dash) - A low-overhead monitoring web dashboard for a GNU/Linux machine.
* [Flapjack](http://flapjack.io/) - Monitoring notification routing & event processing system.
* [Icinga](https://www.icinga.org/) - Nagios fork that has since lapped nagios several times. Comes with the possibility of clustered monitoring - ([Source Code](https://github.com/Icinga)) - `GPLv2`
* [LibreNMS](http://www.librenms.org) - Fully featured network monitoring system that provides a wealth of features and device support.
* [Monit](http://mmonit.com/monit/#home) - Small utility for managing and monitoring Unix systems.
* [Munin](http://munin-monitoring.org/) - Networked resource monitoring tool.
* [Linux Dash](https://github.com/afaqurk/linux-dash) - A simple, low-overhead web dashboard for GNU / Linux. (~1MB) ([Demo](http://linuxdash.afaqtariq.com/))
* [Naemon](http://www.naemon.org/) - Network monitoring tool based on the Nagios 4 core with performance enhancements and new features.
* [Nagios](http://www.nagios.org/) - Computer system, network and infrastructure monitoring software application.
* [Node-Bell](https://github.com/eleme/node-bell) - Real-time anomalies detection for periodic time series, metrics monitor.
* [Observium](http://www.observium.org/) - SNMP monitoring for servers and networking devices. Runs on linux.
* [OMD](http://omdistro.org/) - The Open Monitoring Distribution.
* [PhpSysInfo](https://phpsysinfo.github.io/phpsysinfo/) - A customizable PHP script that displays information about your system nicely
* [Riemann](http://riemann.io/) - Flexible and fast events processor allowing complex events/metrics analysis.
* [Sensu](http://sensuapp.org/) - Monitoring framework.
* [Sentry](https://getsentry.com/) - Application monitoring, event logging and aggregation.
* [ServerStatus BotoX](https://github.com/BotoX/ServerStatus) - Display and monitor your servers statistics in a beatiful way.
* [ServerStatus moejda](https://github.com/mojeda/ServerStatus) - Server Status website script, displays uptime (days), free RAM, free HDD
* [Shinken](http://www.shinken-monitoring.org/) - Another monitoring framework.
* [Thruk](http://www.thruk.org/) - Multibackend monitoring web interface with support for Naemon, Nagios, Icinga and Shinken.
* [Xymon](http://www.xymon.com/) - Network monitoring inspired by Big Brother.
* [Zabbix](http://www.zabbix.com/) - Enterprise-class software for monitoring of networks and applications.
* [Zenoss](http://community.zenoss.org) - Application, server, and network management platform based on Zope.
## Metric & Metric Collection
*Metric gathering and display software.*
@ -407,19 +410,19 @@ See https://github.com/kickball/awesome-selfhosted#email
## Network Configuration Management
*Network configuration management tools.*
* [GestióIP](http://www.gestioip.net/) - An automated web based IPv4/IPv6 IP Address Management tool.
* [Oxidized](https://github.com/ytti/oxidized) - A modern take on network device configuration monitoring with web interface and GIT storage.
* [RANCID](http://www.shrubbery.net/rancid/) - Monitors network device's configuration and maintain history of changes.
* [rConfig](http://www.rconfig.com/) - Another network device configuration management tool.
* [trigger](https://github.com/trigger/trigger) - Robust network automation toolkit written in Python.
* [GestióIP](http://www.gestioip.net/) - An automated web based IPv4/IPv6 IP Address Management tool.
* [Oxidized](https://github.com/ytti/oxidized) - A modern take on network device configuration monitoring with web interface and GIT storage.
* [RANCID](http://www.shrubbery.net/rancid/) - Monitors network device's configuration and maintain history of changes.
* [rConfig](http://www.rconfig.com/) - Another network device configuration management tool.
* [trigger](https://github.com/trigger/trigger) - Robust network automation toolkit written in Python.
## Newsletters
*Newsletter software.*
* [DadaMail](http://dadamailproject.com/) - Mailing List Manager, written in Perl.
* [phpList](http://www.phplist.com/) - Newsletter manager written in PHP.
* [LibreMailer](https://github.com/averna-syd/LibreMailer) - Libre Mailer is a modest and simple web based email marketing application.
* [Lewsnetter](https://github.com/bborn/lewsnetter) - E-mail marketing application (create and send e-mail newsletter via SES). Includes subscription management, delivery, bounce and complaint notification, templates, and some stats.
* [DadaMail](http://dadamailproject.com/) - Mailing List Manager, written in Perl.
* [phpList](http://www.phplist.com/) - Newsletter manager written in PHP.
* [LibreMailer](https://github.com/averna-syd/LibreMailer) - Libre Mailer is a modest and simple web based email marketing application.
* [Lewsnetter](https://github.com/bborn/lewsnetter) - E-mail marketing application (create and send e-mail newsletter via SES). Includes subscription management, delivery, bounce and complaint notification, templates, and some stats.
## NoSQL
*NoSQL databases.*
@ -446,184 +449,184 @@ Comparison of NoSQL servers: http://kkovacs.eu/cassandra-vs-mongodb-vs-couchdb-v
## Packaging
* [fpm](https://github.com/jordansissel/fpm) - Versatile multi format package creator.
* [omnibus-ruby](https://github.com/opscode/omnibus-ruby) - Full stack, cross distro packaging software (Ruby).
* [packman](http://packman.readthedocs.org) - Full stack, cross distro packaging software (Python).
* [tito](https://github.com/dgoodwin/tito) - Builds RPMs for git-based projects.
* [fpm](https://github.com/jordansissel/fpm) - Versatile multi format package creator.
* [omnibus-ruby](https://github.com/opscode/omnibus-ruby) - Full stack, cross distro packaging software (Ruby).
* [packman](http://packman.readthedocs.org) - Full stack, cross distro packaging software (Python).
* [tito](https://github.com/dgoodwin/tito) - Builds RPMs for git-based projects.
## Project Management
*Web-based project management and bug tracking systems*: see https://github.com/Kickball/awesome-selfhosted#project-management
## Queuing
* [ActiveMQ](https://activemq.apache.org/) - Java message broker.
* [BeanstalkD](http://kr.github.io/beanstalkd/) - A simple, fast work queue.
* [Gearman](http://gearman.org/) - Fast multi-language queuing/job processing platform.
* [Kafka](http://kafka.apache.org) - Extremely high performance publish/subscribe message system.
* [NSQ](http://nsq.io/) - A realtime distributed messaging platform.
* [RabbitMQ](http://www.rabbitmq.com/) - Robust, fully featured, cross distro queuing system.
* [ZeroMQ](http://zeromq.org/) - Lightweight queuing system.
* [ActiveMQ](https://activemq.apache.org/) - Java message broker.
* [BeanstalkD](http://kr.github.io/beanstalkd/) - A simple, fast work queue.
* [Gearman](http://gearman.org/) - Fast multi-language queuing/job processing platform.
* [Kafka](http://kafka.apache.org) - Extremely high performance publish/subscribe message system.
* [NSQ](http://nsq.io/) - A realtime distributed messaging platform.
* [RabbitMQ](http://www.rabbitmq.com/) - Robust, fully featured, cross distro queuing system.
* [ZeroMQ](http://zeromq.org/) - Lightweight queuing system.
## RDBMS
*Relational DBMS.*
* [Firebird](http://www.firebirdsql.org/) - True universal database.
* [Galera](http://galeracluster.com/) - Galera Cluster for MySQL is an easy-to-use high-availability solution with high system up-time, no data loss, and scalability for future growth.
* [MariaDB](https://mariadb.org/) - Community-developed fork of the MySQL.
* [adminer](http://www.adminer.org/) - Database management in a single PHP file ([Source code](https://github.com/vrana/adminer))
* [Percona Server](http://www.percona.com/software) - Enhanced, drop-in MySQL replacement.
* [PostgreSQL](http://www.postgresql.org/) - Object-relational database management system (ORDBMS).
* [PostgreSQL-XL](http://www.postgres-xl.org/) - Scalable PostgreSQL-based database cluster.
* [SQLite](http://sqlite.org/) - Library that implements a self-contained, serverless, zero-configuration, transactional SQL DBS.
* [Firebird](http://www.firebirdsql.org/) - True universal database.
* [Galera](http://galeracluster.com/) - Galera Cluster for MySQL is an easy-to-use high-availability solution with high system up-time, no data loss, and scalability for future growth.
* [MariaDB](https://mariadb.org/) - Community-developed fork of the MySQL.
* [adminer](http://www.adminer.org/) - Database management in a single PHP file ([Source code](https://github.com/vrana/adminer))
* [Percona Server](http://www.percona.com/software) - Enhanced, drop-in MySQL replacement.
* [PostgreSQL](http://www.postgresql.org/) - Object-relational database management system (ORDBMS).
* [PostgreSQL-XL](http://www.postgres-xl.org/) - Scalable PostgreSQL-based database cluster.
* [SQLite](http://sqlite.org/) - Library that implements a self-contained, serverless, zero-configuration, transactional SQL DBS.
## Security
*Security tools.*
* [Blackbox](https://github.com/StackExchange/blackbox) - Safely store secrets in Git/Mercurial. Provides tooling to automatically encrypt secrets like passwords.
* [Bro](http://www.bro.org) - Bro is a powerful framework for network analysis and security monitoring.
* [Denyhosts](http://denyhosts.sourceforge.net/) - Thwart SSH dictionary based attacks and brute force attacks.
* [Fail2Ban](http://www.fail2ban.org/wiki/index.php/Main_Page) - Scans log files and takes action on IPs that show malicious behavior.
* [fwknop](https://www.cipherdyne.org/fwknop/) - Protects ports via Single Packet Authorization in your firewall.
* [Glastopf](http://glastopf.org/) - A low-interaction web application honeypot to emulate vulnerabilities and gather attack data.
* [Kippo](https://github.com/desaster/kippo) - A medium-interaction SSH honeypot, mostly used as a standalone SSH daemon with a configurable Filesystem sandbox.
* [Linux Malware Detect](https://www.rfxn.com/projects/linux-malware-detect/) - A malware scanner for Linux designed around the threats faced in shared hosted environments.
* [OSSEC](http://ossec.net) - OSSEC is a HIDS that performs log analysis, FIM, rootkit detection, and much more.
* [OSQuery](https://osquery.io/) - Query your servers status and info using a SQL like interface.
* [pfSense](https://www.pfsense.org/) - Firewall and Router FreeBSD distribution.
* [Snort](https://www.snort.org/) - Network intrusion prevention system (NIPS) and network intrusion detection system (NIDS).
* [SpamAssassin](https://spamassassin.apache.org/) - A powerful and popular email spam filter employing a variety of detection technique.
* [Nmap](https://nmap.org) - Nmap is a free and open source utility for network discovery and security auditing.
* [Blackbox](https://github.com/StackExchange/blackbox) - Safely store secrets in Git/Mercurial. Provides tooling to automatically encrypt secrets like passwords.
* [Bro](http://www.bro.org) - Bro is a powerful framework for network analysis and security monitoring.
* [Denyhosts](http://denyhosts.sourceforge.net/) - Thwart SSH dictionary based attacks and brute force attacks.
* [Fail2Ban](http://www.fail2ban.org/wiki/index.php/Main_Page) - Scans log files and takes action on IPs that show malicious behavior.
* [fwknop](https://www.cipherdyne.org/fwknop/) - Protects ports via Single Packet Authorization in your firewall.
* [Glastopf](http://glastopf.org/) - A low-interaction web application honeypot to emulate vulnerabilities and gather attack data.
* [Kippo](https://github.com/desaster/kippo) - A medium-interaction SSH honeypot, mostly used as a standalone SSH daemon with a configurable Filesystem sandbox.
* [Linux Malware Detect](https://www.rfxn.com/projects/linux-malware-detect/) - A malware scanner for Linux designed around the threats faced in shared hosted environments.
* [OSSEC](http://ossec.net) - OSSEC is a HIDS that performs log analysis, FIM, rootkit detection, and much more.
* [OSQuery](https://osquery.io/) - Query your servers status and info using a SQL like interface.
* [pfSense](https://www.pfsense.org/) - Firewall and Router FreeBSD distribution.
* [Snort](https://www.snort.org/) - Network intrusion prevention system (NIPS) and network intrusion detection system (NIDS).
* [SpamAssassin](https://spamassassin.apache.org/) - A powerful and popular email spam filter employing a variety of detection technique.
* [Nmap](https://nmap.org) - Nmap is a free and open source utility for network discovery and security auditing.
## Service Discovery
* [Consul](http://www.consul.io/) - Consul is a tool for service discovery, monitoring and configuration.
* [Doozerd](https://github.com/ha/doozerd) - Doozer is a highly-available, completely consistent store for small amounts of extremely important data.
* [etcd](https://github.com/coreos/etcd) - distributed K/V-Store, authenticating via SSL PKI and a REST HTTP Api for shared configuration and service discovery.
* [ZooKeeper](http://zookeeper.apache.org/) - ZooKeeper is a centralized service for maintaining configuration information, naming, providing distributed synchronization, and providing group services.
* [Consul](http://www.consul.io/) - Consul is a tool for service discovery, monitoring and configuration.
* [Doozerd](https://github.com/ha/doozerd) - Doozer is a highly-available, completely consistent store for small amounts of extremely important data.
* [etcd](https://github.com/coreos/etcd) - distributed K/V-Store, authenticating via SSL PKI and a REST HTTP Api for shared configuration and service discovery.
* [ZooKeeper](http://zookeeper.apache.org/) - ZooKeeper is a centralized service for maintaining configuration information, naming, providing distributed synchronization, and providing group services.
## Software Containers
*Operating system–level virtualization.*
## Software Containers
*Operating system–level virtualization.*
* [Docker](http://www.docker.com/) - Platform for developers and sysadmins to build, ship, and run distributed applications.
* [LXC](https://linuxcontainers.org/lxc/) - Userspace interface for the Linux kernel containment features.
* [OpenVZ](http://openvz.org) - Container-based virtualization for Linux.
* [Docker](http://www.docker.com/) - Platform for developers and sysadmins to build, ship, and run distributed applications.
* [LXC](https://linuxcontainers.org/lxc/) - Userspace interface for the Linux kernel containment features.
* [OpenVZ](http://openvz.org) - Container-based virtualization for Linux.
## SSH
*SSH tools.*
* [Advanced SSH config](https://pypi.python.org/pypi/advanced-ssh-config/) - Enhances ssh_config file capabilities, completely transparent.
* [autossh](http://www.harding.motd.ca/autossh/) - Automatically respawn ssh session after network interruption.
* [Cluster SSH](http://sourceforge.net/projects/clusterssh/) - Controls a number of xterm windows via a single graphical console.
* [DSH](http://www.netfort.gr.jp/~dancer/software/dsh.html.en) - Dancer's shell / distributed shell - Wrapper for executing multiple remote shell commands from one command line.
* [Mosh](http://mosh.mit.edu/) - The mobile shell.
* [parallel-ssh](http://code.google.com/p/parallel-ssh/) - Provides parallel versions of OpenSSH and related tools.
* [ssh-cert-authority](https://github.com/cloudtools/ssh-cert-authority) - A democratic SSH certificate authority.
* [ssh-ca](https://github.com/cloudtools/ssh-ca/) - Allows giving ssh access to servers without putting a users key on the server, as well as expiring access.
* [SSH Power Tool](http://code.google.com/p/sshpt/) - Execute commands and upload files to many servers simultaneously without using pre-shared keys.
* [sshrc](https://github.com/Russell91/sshrc) - sources ~/.sshrc on your local computer after logging in remotely.
* [stormssh](http://stormssh.readthedocs.org) - A command line tool to manage SSH connections.
* [Advanced SSH config](https://pypi.python.org/pypi/advanced-ssh-config/) - Enhances ssh_config file capabilities, completely transparent.
* [autossh](http://www.harding.motd.ca/autossh/) - Automatically respawn ssh session after network interruption.
* [Cluster SSH](http://sourceforge.net/projects/clusterssh/) - Controls a number of xterm windows via a single graphical console.
* [DSH](http://www.netfort.gr.jp/~dancer/software/dsh.html.en) - Dancer's shell / distributed shell - Wrapper for executing multiple remote shell commands from one command line.
* [Mosh](http://mosh.mit.edu/) - The mobile shell.
* [parallel-ssh](http://code.google.com/p/parallel-ssh/) - Provides parallel versions of OpenSSH and related tools.
* [ssh-cert-authority](https://github.com/cloudtools/ssh-cert-authority) - A democratic SSH certificate authority.
* [ssh-ca](https://github.com/cloudtools/ssh-ca/) - Allows giving ssh access to servers without putting a users key on the server, as well as expiring access.
* [SSH Power Tool](http://code.google.com/p/sshpt/) - Execute commands and upload files to many servers simultaneously without using pre-shared keys.
* [sshrc](https://github.com/Russell91/sshrc) - sources ~/.sshrc on your local computer after logging in remotely.
* [stormssh](http://stormssh.readthedocs.org) - A command line tool to manage SSH connections.
## Statistics
*Analytics software.*
* [AWStats](http://www.awstats.org/) - Generates web, streaming, ftp or mail server statistics graphically.
* [GoAccess](http://goaccess.io/) - Real-time web log analyzer and interactive viewer that runs in a terminal.
* [Open Web Analytics](http://www.openwebanalytics.com/) - Add web analytics to websites using JS, PHP or REST APIs.
* [Piwik](http://piwik.org/) - Web analytics application.
* [Webalizer](http://www.webalizer.org/) - Fast web server log file analysis.
* [AWStats](http://www.awstats.org/) - Generates web, streaming, ftp or mail server statistics graphically.
* [GoAccess](http://goaccess.io/) - Real-time web log analyzer and interactive viewer that runs in a terminal.
* [Open Web Analytics](http://www.openwebanalytics.com/) - Add web analytics to websites using JS, PHP or REST APIs.
* [Piwik](http://piwik.org/) - Web analytics application.
* [Webalizer](http://www.webalizer.org/) - Fast web server log file analysis.
## Status Pages
* [Cachet](https://cachethq.io) - Status page system written in PHP.
* [Stashboard](http://www.stashboard.org) - Status page for cloud services and APIs.
* [System Status Dashboard (SSD)](http://www.system-status-dashboard.com/) - Overview about an organization's infrastructure health status.
* [Staytus](http://staytus.co/) - Staytus is a complete solution for publishing the latest information about any issues with your web applications, networks or services.
* [Cachet](https://cachethq.io) - Status page system written in PHP.
* [Stashboard](http://www.stashboard.org) - Status page for cloud services and APIs.
* [System Status Dashboard (SSD)](http://www.system-status-dashboard.com/) - Overview about an organization's infrastructure health status.
* [Staytus](http://staytus.co/) - Staytus is a complete solution for publishing the latest information about any issues with your web applications, networks or services.
## Ticketing systems
*Web-based ticketing system.*
* [Bugzilla](http://www.bugzilla.org/) - General-purpose bugtracker and testing tool originally developed and used by the Mozilla project.
* [Cerb](http://www.cerberusweb.com/) - Group-based e-mail management project.
* [Flyspray](http://flyspray.org) - Web-based bug tracking system written in PHP.
* [MantisBT](http://www.mantisbt.org/) - Web-based bug tracking system.
* [osTicket](http://osticket.com/) - Simple support ticket system.
* [OTRS](http://www.otrs.com/) - Trouble ticket system for assigning tickets to incoming queries and tracking further communications.
* [Request Tracker](http://www.bestpractical.com/rt/) - Ticket-tracking system written in Perl.
* [TheBugGenie](http://www.thebuggenie.com) - Ticket system with extensive user rights system.
* [Bugzilla](http://www.bugzilla.org/) - General-purpose bugtracker and testing tool originally developed and used by the Mozilla project.
* [Cerb](http://www.cerberusweb.com/) - Group-based e-mail management project.
* [Flyspray](http://flyspray.org) - Web-based bug tracking system written in PHP.
* [MantisBT](http://www.mantisbt.org/) - Web-based bug tracking system.
* [osTicket](http://osticket.com/) - Simple support ticket system.
* [OTRS](http://www.otrs.com/) - Trouble ticket system for assigning tickets to incoming queries and tracking further communications.
* [Request Tracker](http://www.bestpractical.com/rt/) - Ticket-tracking system written in Perl.
* [TheBugGenie](http://www.thebuggenie.com) - Ticket system with extensive user rights system.
## Troubleshooting
*Troubleshooting Tools.*
+ [grml](https://grml.org) – bootable Debian Live CD with powerful CLI tools.
* [mitmproxy](http://mitmproxy.org/) - A Python tool used for intercepting, viewing and modifying network traffic. Invaluable in troubleshooting certain problems.
* [Sysdig](http://www.sysdig.org/) - Capture system state and activity from a running Linux instance, then save, filter and analyze.
* [Wireshark](http://www.wireshark.org/) - The world's foremost network protocol analyzer.
+ [grml](https://grml.org) – bootable Debian Live CD with powerful CLI tools.
* [mitmproxy](http://mitmproxy.org/) - A Python tool used for intercepting, viewing and modifying network traffic. Invaluable in troubleshooting certain problems.
* [Sysdig](http://www.sysdig.org/) - Capture system state and activity from a running Linux instance, then save, filter and analyze.
* [Wireshark](http://www.wireshark.org/) - The world's foremost network protocol analyzer.
## Version control
*Software versioning and revision control.*
* [Fossil](http://www.fossil-scm.org/) - Distributed version control with built-in wiki and bug tracking.
* [Git](http://git-scm.com/) - Distributed revision control and source code management (SCM) with an emphasis on speed.
* [GNU Bazaar](http://bazaar.canonical.com/) - Distributed revision control system sponsored by Canonical.
* [Mercurial](http://mercurial.selenic.com/) - Another distributed revision control.
* [Subversion](http://subversion.apache.org/) - Client-server revision control system.
* [Fossil](http://www.fossil-scm.org/) - Distributed version control with built-in wiki and bug tracking.
* [Git](http://git-scm.com/) - Distributed revision control and source code management (SCM) with an emphasis on speed.
* [GNU Bazaar](http://bazaar.canonical.com/) - Distributed revision control system sponsored by Canonical.
* [Mercurial](http://mercurial.selenic.com/) - Another distributed revision control.
* [Subversion](http://subversion.apache.org/) - Client-server revision control system.
## Virtualization
*Virtualization software.*
* [Archipel](http://archipelproject.org/) - XMPP based virtualization management platform.
* [ConVirt](http://www.convirture.com/products_opensource.php) - Provides the core functionality for centrally managing your KVM or Xen virtualized environment.
* [Ganeti](https://code.google.com/p/ganeti/) - Cluster virtual server management software tool built on top of KVM and Xen.
* [KVM](http://www.linux-kvm.org) - Linux kernel virtualization infrastructure.
* [OpenNebula](http://opennebula.org/) - Flexible enterprise cloud made simple.
* [OpenNode](http://opennodecloud.com) - Builds open-source infrastructure management software and implements cloud systems.
* [oVirt](http://www.ovirt.org/) - Manages virtual machines, storage and virtual networks.
* [Packer](http://www.packer.io/) - A tool for creating identical machine images for multiple platforms from a single source configuration.
* [Proxmox VE](https://www.proxmox.com/proxmox-ve) - Virtualization management solution.
* [QEMU](http://www.qemu.org/) - QEMU is a generic machine emulator and virtualizer.
* [Vagrant](https://www.vagrantup.com/) - Tool for building complete development environments.
* [VirtualBox](https://www.virtualbox.org/) - Virtualization product from Oracle Corporation.
* [Xen](http://www.xenproject.org/) - Virtual machine monitor for 32/64 bit Intel / AMD (IA 64) and PowerPC 970 architectures.
* [Archipel](http://archipelproject.org/) - XMPP based virtualization management platform.
* [ConVirt](http://www.convirture.com/products_opensource.php) - Provides the core functionality for centrally managing your KVM or Xen virtualized environment.
* [Ganeti](https://code.google.com/p/ganeti/) - Cluster virtual server management software tool built on top of KVM and Xen.
* [KVM](http://www.linux-kvm.org) - Linux kernel virtualization infrastructure.
* [OpenNebula](http://opennebula.org/) - Flexible enterprise cloud made simple.
* [OpenNode](http://opennodecloud.com) - Builds open-source infrastructure management software and implements cloud systems.
* [oVirt](http://www.ovirt.org/) - Manages virtual machines, storage and virtual networks.
* [Packer](http://www.packer.io/) - A tool for creating identical machine images for multiple platforms from a single source configuration.
* [Proxmox VE](https://www.proxmox.com/proxmox-ve) - Virtualization management solution.
* [QEMU](http://www.qemu.org/) - QEMU is a generic machine emulator and virtualizer.
* [Vagrant](https://www.vagrantup.com/) - Tool for building complete development environments.
* [VirtualBox](https://www.virtualbox.org/) - Virtualization product from Oracle Corporation.
* [Xen](http://www.xenproject.org/) - Virtual machine monitor for 32/64 bit Intel / AMD (IA 64) and PowerPC 970 architectures.
## VPN
*VPN software.*
* [OpenVPN](https://community.openvpn.net) - Uses a custom security protocol that utilizes SSL/TLS for key exchange.
* [Pritunl](http://pritunl.com/) - OpenVPN based solution. Easy to set up.
* [SoftEther](https://www.softether.org/) - Multi-protocol software VPN with advanced features
* [sshuttle](https://github.com/apenwarr/sshuttle) - Poor man's VPN.
* [strongSwan](http://www.strongswan.org/) - Complete IPsec implementation for Linux.
* [tinc](http://www.tinc-vpn.org/) - Distributed p2p VPN.
* [OpenVPN](https://community.openvpn.net) - Uses a custom security protocol that utilizes SSL/TLS for key exchange.
* [Pritunl](http://pritunl.com/) - OpenVPN based solution. Easy to set up.
* [SoftEther](https://www.softether.org/) - Multi-protocol software VPN with advanced features
* [sshuttle](https://github.com/apenwarr/sshuttle) - Poor man's VPN.
* [strongSwan](http://www.strongswan.org/) - Complete IPsec implementation for Linux.
* [tinc](http://www.tinc-vpn.org/) - Distributed p2p VPN.
## XMPP
*XMPP servers.*
* [ejabberd](http://www.ejabberd.im/) - XMPP instant messaging server written in Erlang/OTP.
* [Metronome IM](http://www.lightwitch.org/metronome) - Fork of Prosody IM.
* [MongooseIM](https://www.erlang-solutions.com/products/mongooseim-massively-scalable-ejabberd-platform) - Fork of ejabberd.
* [Openfire](http://www.igniterealtime.org/projects/openfire/) - Real time collaboration (RTC) server.
* [Prosody IM](http://prosody.im/) - XMPP server written in Lua.
* [Tigase](https://projects.tigase.org/projects/tigase-server) - XMPP server implementation in Java.
* [ejabberd](http://www.ejabberd.im/) - XMPP instant messaging server written in Erlang/OTP.
* [Metronome IM](http://www.lightwitch.org/metronome) - Fork of Prosody IM.
* [MongooseIM](https://www.erlang-solutions.com/products/mongooseim-massively-scalable-ejabberd-platform) - Fork of ejabberd.
* [Openfire](http://www.igniterealtime.org/projects/openfire/) - Real time collaboration (RTC) server.
* [Prosody IM](http://prosody.im/) - XMPP server written in Lua.
* [Tigase](https://projects.tigase.org/projects/tigase-server) - XMPP server implementation in Java.
*XMPP Web Clients*
* [Candy](http://candy-chat.github.io/candy/) - Multi user XMPP client written in Javascript.
* [Kaiwa](http://getkaiwa.com/) - Web based chat client in the style of common paid alternatives.
* [Lets-Chat](http://sdelements.github.io/lets-chat/) - A self hosted chat suite written in Node.
* [Candy](http://candy-chat.github.io/candy/) - Multi user XMPP client written in Javascript.
* [Kaiwa](http://getkaiwa.com/) - Web based chat client in the style of common paid alternatives.
* [Lets-Chat](http://sdelements.github.io/lets-chat/) - A self hosted chat suite written in Node.
## Web
*Web servers.*
* [Apache](http://httpd.apache.org/) - Most popular web server.
* [Cherokee](http://cherokee-project.com/) - Lightweight, high-performance web server/reverse proxy.
* [Lighttpd](http://www.lighttpd.net/) - Web server more optimized for speed-critical environments.
* [Nginx](http://nginx.org/) - Reverse proxy, load balancer, HTTP cache, and web server.
* [uWSGI](https://github.com/unbit/uwsgi/) - The uWSGI project aims at developing a full stack for building hosting services.
* [Apache](http://httpd.apache.org/) - Most popular web server.
* [Cherokee](http://cherokee-project.com/) - Lightweight, high-performance web server/reverse proxy.
* [Lighttpd](http://www.lighttpd.net/) - Web server more optimized for speed-critical environments.
* [Nginx](http://nginx.org/) - Reverse proxy, load balancer, HTTP cache, and web server.
* [uWSGI](https://github.com/unbit/uwsgi/) - The uWSGI project aims at developing a full stack for building hosting services.
*Web Performance*
* [HAProxy](http://www.haproxy.org/) - Software based load Balancing, SSL offloading and performance optimization, compression, and general web routing.
* [Varnish](https://www.varnish-cache.org/) - HTTP based web application accelerator focusing on optimizing caching and compression.
* [HAProxy](http://www.haproxy.org/) - Software based load Balancing, SSL offloading and performance optimization, compression, and general web routing.
* [Varnish](https://www.varnish-cache.org/) - HTTP based web application accelerator focusing on optimizing caching and compression.
## Wiki Software
@ -635,61 +638,61 @@ Various resources, such as books, websites and articles, for improving your skil
## Blogs
* [Code as Craft](http://codeascraft.com/) - Etsy's Ops blog, lots of technical posts.
* [DevOpsGuys](http://blog.devopsguys.com/) - Devops consultants who blog about operations.
* [Rackspace Developers](http://developer.rackspace.com/blog/) - Slightly biased blog with lots of Devops Topics.
* [Code as Craft](http://codeascraft.com/) - Etsy's Ops blog, lots of technical posts.
* [DevOpsGuys](http://blog.devopsguys.com/) - Devops consultants who blog about operations.
* [Rackspace Developers](http://developer.rackspace.com/blog/) - Slightly biased blog with lots of Devops Topics.
## Books
*Sysadmin related books.*
* [The Linux Command Line](http://linuxcommand.org/tlcl.php) - A book about the Linux command line by William Shotts.
* [The Phoenix Project: A Novel about IT, DevOps, and Helping Your Business Win](http://itrevolution.com/books/phoenix-project-devops-book/) - How DevOps techniques can fix the problems that happen in IT organizations.
* [The Practice of System and Network Administration](http://everythingsysadmin.com/books.html) - The first and second editions describes the best practices of system and network administration, independent of specific platforms or technologies.
* [The Visible Ops Handbook: Implementing ITIL in 4 Practical and Auditable Steps](http://www.itpi.org/the-visible-ops-handbook-review.html) - Is a methodology designed to jumpstart implementation of controls and process improvement.
* [UNIX and Linux System Administration Handbook](http://www.admin.com/) - Approaches system administration from a practical perspective.
* [The Linux Command Line](http://linuxcommand.org/tlcl.php) - A book about the Linux command line by William Shotts.
* [The Phoenix Project: A Novel about IT, DevOps, and Helping Your Business Win](http://itrevolution.com/books/phoenix-project-devops-book/) - How DevOps techniques can fix the problems that happen in IT organizations.
* [The Practice of System and Network Administration](http://everythingsysadmin.com/books.html) - The first and second editions describes the best practices of system and network administration, independent of specific platforms or technologies.
* [The Visible Ops Handbook: Implementing ITIL in 4 Practical and Auditable Steps](http://www.itpi.org/the-visible-ops-handbook-review.html) - Is a methodology designed to jumpstart implementation of controls and process improvement.
* [UNIX and Linux System Administration Handbook](http://www.admin.com/) - Approaches system administration from a practical perspective.
## Communities / Forums
*For the social people.*
* [ArsTechnica OpenForum](http://arstechnica.com/civis/) – IT Forum which is attached to a large news site.
* [Reddit](https://www.reddit.com) - Really, really large bulletin board system.
* [/r/Linux](https://www.reddit.com/r/linux) - News and information about Linux.
* [/r/LinuxQuestions](https://www.reddit.com/r/linuxquestions)
* [/r/SysAdmin](https://www.reddit.com/r/sysadmin/)
* [Spiceworks Community](https://community.spiceworks.com/start) – General enterprise IT news and small articles.
* [StackExchange Network](https://stackexchange.com/sites#technology) – Q&A communities.
* [Server Fault](https://serverfault.com/) – StackExchange community for system and network administrators.
* [ArsTechnica OpenForum](http://arstechnica.com/civis/) – IT Forum which is attached to a large news site.
* [Reddit](https://www.reddit.com) - Really, really large bulletin board system.
* [/r/Linux](https://www.reddit.com/r/linux) - News and information about Linux.
* [/r/LinuxQuestions](https://www.reddit.com/r/linuxquestions)
* [/r/SysAdmin](https://www.reddit.com/r/sysadmin/)
* [Spiceworks Community](https://community.spiceworks.com/start) – General enterprise IT news and small articles.
* [StackExchange Network](https://stackexchange.com/sites#technology) – Q&A communities.
* [Server Fault](https://serverfault.com/) – StackExchange community for system and network administrators.
## Newsletters
* [Servers for Hackers](http://serversforhackers.com/) - Newsletter for programmers who find themselves needing to know their way around a server.
* [Web Operations Weekly](http://webopsweekly.com/) - A weekly newsletter on Web operations, infrastructure, performance, and tooling, from the browser down to the metal.
* [Servers for Hackers](http://serversforhackers.com/) - Newsletter for programmers who find themselves needing to know their way around a server.
* [Web Operations Weekly](http://webopsweekly.com/) - A weekly newsletter on Web operations, infrastructure, performance, and tooling, from the browser down to the metal.
## Repositories
*Software package repositories.*
* [AlternativeTo](http://alternativeto.net) - Find alternatives to software you know and discover new software.
* [AlternativeTo](http://alternativeto.net) - Find alternatives to software you know and discover new software.
### Debian-based distributions
* [Dotdeb](http://www.dotdeb.org/) - Repository with LAMP updated packages for Debian.
* [Dotdeb](http://www.dotdeb.org/) - Repository with LAMP updated packages for Debian.
### RPM-based distributions
* [ElRepo](http://elrepo.org/tiki/tiki-index.php) - Community Repo for Enterprise Linux (RHEL, CentOS, etc).
* [EPEL](https://fedoraproject.org/wiki/EPEL) - Repository for RHEL and compatibles (CentOS, Scientific Linux).
* [Remi](http://rpms.famillecollet.com/) - Repository with LAMP updated packages for RHEL/Centos/Fedora.
* [Software Collections](https://www.softwarecollections.org) - Community Release of [Red Hat Software Collections](https://access.redhat.com/documentation/en-US/Red_Hat_Software_Collections/). Provides updated packages of Ruby, Python, etc. for CentOS/Scientific Linux 6.x.
* [ElRepo](http://elrepo.org/tiki/tiki-index.php) - Community Repo for Enterprise Linux (RHEL, CentOS, etc).
* [EPEL](https://fedoraproject.org/wiki/EPEL) - Repository for RHEL and compatibles (CentOS, Scientific Linux).
* [Remi](http://rpms.famillecollet.com/) - Repository with LAMP updated packages for RHEL/Centos/Fedora.
* [Software Collections](https://www.softwarecollections.org) - Community Release of [Red Hat Software Collections](https://access.redhat.com/documentation/en-US/Red_Hat_Software_Collections/). Provides updated packages of Ruby, Python, etc. for CentOS/Scientific Linux 6.x.
## Websites
*Useful sysadmin related websites.*
* [Ops School](http://www.opsschool.org) - Comprehensive program that will help you learn to be an operations engineer.
* [Digital Ocean Tutorials](https://www.digitalocean.com/community/tutorials) - A surprisingly vast resource for getting the basics of certain applications, tools, or even systems administration topics.
* [Ops School](http://www.opsschool.org) - Comprehensive program that will help you learn to be an operations engineer.
* [Digital Ocean Tutorials](https://www.digitalocean.com/community/tutorials) - A surprisingly vast resource for getting the basics of certain applications, tools, or even systems administration topics.
## Wikis
*Useful Wikis for Sysadmins – not to be confused with Wiki software.*
* [ArchWiki](https://wiki.archlinux.org/) – Arch Linux Wiki which has really nice written articles valid for other distros.
* [Gentoo Wiki](https://wiki.gentoo.org/) - Gentoo Linux Wiki with a lot in-detail description of Linux components.
* [ArchWiki](https://wiki.archlinux.org/) – Arch Linux Wiki which has really nice written articles valid for other distros.
* [Gentoo Wiki](https://wiki.gentoo.org/) - Gentoo Linux Wiki with a lot in-detail description of Linux components.
## License