SELinux is a kernel module that injects additional security-focused functionalities into the Linux kernel. Here's how you can install it on Ubuntu.

You can improve the security of your Linux system by installing and implementing SELinux. This provides an extra layer of protection by isolating applications on the system and securing the host. 

By default, Ubuntu uses AppArmor, another Mandatory Access Control system. To make your Linux system more secure, you can make use of SELinux instead. Let's see how you can install and configure SELinux on Ubuntu using a few basic Linux commands.