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53 lines
1.3 KiB
Markdown
53 lines
1.3 KiB
Markdown
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# SELinux in Ubuntu Lab
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The following can be completed with Ubuntu 22.x or later.
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## Installing and Enabling SELinux
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The first step is to install SELinux. Start by opening a command line terminal and installing the necessary packages with the apt commands below.
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```
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$sudo apt update
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$ sudo apt install policycoreutils selinux-utils selinux-basics
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```
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### Activate SELinux
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Execute the following command with root permissions to enable SELinux on the system.
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```
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$ sudo selinux-activate
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```
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## Enforcing Mode
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Set SELinux to enforcing mode:
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```
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$ sudo selinux-config-enforcing
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```
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Reboot your system. The relabelling will be triggered after you reboot your system. When finished the system will reboot one more time automatically.
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```
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$ reboot
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```
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Check SELinux status with the following command to ensure that it is in enforcing mode.
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$ sestatus
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## Disabling SELinux
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To disable SELinux open up the `/etc/selinux/config` configuration file and change the following line:
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FROM:
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```
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SELINUX=enforcing
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```
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TO:
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```
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SELINUX=disabled
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```
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Reboot your system for the changes to take effect.
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Alternatively you can temporarily put SELinux into permissive mode with the following command.
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```
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$ sudo setenforce 0
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```
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Note this change will not be persistent (i.e., survive a reboot). It will go back to enforcing later. To enable SELinux again just execute:
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```
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$ sudo setenforce 1
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```
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