SELinux Ubuntu has a Mandatory Access Control (MAC) framework like SELinux, named AppArmor. Both SELinux and AppArmor give a bunch of apparatuses to seclude applications from one another to shield the host framework from being undermined. AppArmor offers Ubuntu clients required admittance control alternatives, without the apparent trouble or expectation to absorb information that SELinux may have. Notwithstanding, in the event that you are changing to Ubuntu 18.04, are now acquainted with SELinux, and might want to utilize it to implement security on your framework, you can introduce it by following the means in this guide.
In this post, We will install SElinux in ubuntu 18.04 LTS
Step 1: Update and Upgrade the System
You need to update and upgrade the default packages by using the given command.
$ sudo apt-get update && sudo apt-get upgrade -y 
Step 2: Uninstall AppArmor
By default Apparmor is installed in your ubuntu machine, You need to stop the service and uninstall the AppArmor by following the given command.
$ sudo systemctl stop apparmor
$ sudo apt-get --purge remove apparmor -y
Step 3: Restart the Machine
To get changes you need to reboot the ubuntu machine by execution given command.
$ sudo rebootStep 4: Install SELinux
You are ready to install the SElinux packages and dependencies by following the given command.
$ sudo apt-get install selinux selinux-basics selinux-utils audispd-plugins auditd -y
Step 5 : Restart the Machine
SElinux installed but to work proper you need to again reboot your ubuntu machine.
$ sudo rebootStep 6: Get SELinux Status
Verify the SElinux status by execution of the given command.
$ sudo sestatus
Conclusion
In this post, We have successfully installed SElinux on ubuntu 20.04 LTS server, Still you have any question, Please leave a comment.