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115 lines
5.4 KiB
Markdown
115 lines
5.4 KiB
Markdown
---
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layout: doc
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title: Templates
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permalink: /doc/templates/
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redirect_from:
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- /en/doc/templates/
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- /doc/Templates/
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- /wiki/Templates/
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---
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TemplateVMs
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===========
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Every TemplateBasedVM in Qubes is, as the name implies, based on some TemplateVM.
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The TemplateVM is where all the software available to TemplateBasedVMs is installed.
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The default template is based on Fedora, but there are additional templates based on other Linux distributions.
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There are also templates available with or without certain software preinstalled.
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The concept of TemplateVMs is initially described [here](/getting-started/#appvms-qubes-and-templatevms).
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The technical details of this implementation are described in the developer documentation [here](/doc/template-implementation/).
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Some templates are available in ready-to-use binary form, but some of them are available only as source code, which can be built using the [Qubes Builder](/doc/qubes-builder/). In particular, some template "flavors" are available in source code form only. Take a look at the [Qubes Builder documentation](/doc/qubes-builder/) for instructions on how to compile them.
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To reinstall a currently installed TemplateVM, see [here](/doc/reinstall-template/).
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Invisible Things Lab (ITL) Supported templates
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-----------------------
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These are the templates ITL builds and releases updates for.
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ITL guarantees that the binary updates are compiled from exactly the same source code as we publish.
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* Fedora (default base template)
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* [Fedora - Minimal](/doc/templates/fedora-minimal)
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* [Debian](/doc/templates/debian/)
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Community Supported templates
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-----------------------------
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These templates are supported by the Qubes community. Some of them are available in ready-to-use binary package form (built by ITL), while others are available only in source code form. In all cases, ITL does not provide updates for these templates. However, such updates may be provided by the template maintainer.
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By installing these templates, you are trusting not only ITL and the distribution maintainers, but also the template maintainer. In addition, these templates may be somewhat less stable, since ITL does not test them.
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* [Whonix](/doc/templates/whonix/)
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* [Ubuntu](/doc/templates/ubuntu/)
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* [Archlinux](/doc/templates/archlinux/)
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Important Notes (R4.0)
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---------------
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* Whenever a TemplateBasedVM is created, the contents of the `/home`
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directory of its parent TemplateVM are *not* copied to the child TemplateBasedVM's
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`/home`. The child TemplateBasedVM's `/home`
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is always independent from its parent TemplateVM's `/home`, which means that any
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subsequent changes to the parent TemplateVM's `/home` will not affect
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the child TemplateBasedVM's `/home`.
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* Template VMs are created in a thin pool, making `qvm-trim-template`
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no longer necessary.
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The root filesystems in Standalone VMs can employ
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TRIM/discard on the root fs using normal tools and configuration options.
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Important Notes (R3.2 and earlier)
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---------------
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* Whenever a TemplateBasedVM is created, the contents of the `/home`
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directory of its parent TemplateVM are copied to the child TemplateBasedVM's
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`/home`. From that point onward, the child TemplateBasedVM's `/home`
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is independent from its parent TemplateVM's `/home`, which means that any
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subsequent changes to the parent TemplateVM's `/home` will no longer affect
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the child TemplateBasedVM's `/home`.
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* Template VMs can occupy more space on the dom0 filesystem than necessary
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because they cannot employ automatic TRIM/discard on the root fs. The
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`qvm-trim-template` command in dom0 is used to recover this unused space.
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Conversely, the root filesystems in Standalone VMs *can* employ
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TRIM/discard on the root fs using normal tools and configuration options.
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Important Notes (all versions)
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---------------
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* Once a TemplateBasedVM has been created, any changes in its `/home`,
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`/usr/local`, or `/rw/config` directories will be persistent across reboots,
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which means that any files stored there will still be available after
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restarting the TemplateBasedVM. No changes in any other directories in
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TemplateBasedVMs persist in this manner. If you would like to make changes
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in other directories which *do* persist in this manner, you must make those
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changes in the parent TemplateVM.
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* Templates are not automatically updated when
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[updating dom0](/doc/software-update-dom0/). This is by design, since doing
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so would cause all user modifications to templates to be lost. Instead, you
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should update your templates
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[from within each template](/doc/software-update-vm/). If you *do* want to
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update a template from dom0 (and thereby lose any user modifications in the
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existing template), you must first uninstall the existing template from dom0:
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$ sudo dnf remove qubes-template-fedora-25
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* Standalone VMs using Template VMs as a basis can be created easily. These
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VMs receive a *copy* of the operating system and do not get automatically
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updated when Template VMs are updated--they must be updated individually.
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* On XFCE based Dom0, a manual action may be required to remove the "Start Menu"
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sub-menu of the removed TemplateVM. For example, to remove a dangling sub-menu
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for a removed "fedora-25" template, open a Dom0 Terminal and type:
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$ rm ~/.local/share/applications/fedora-25-*
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Just make sure there are no other TemplateVMs whose names start with "fedora-25"
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or else their menu items will be removed too.
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