Linux

Linux is a free operating system; you should try it.

There are also vendors who support Linux.

The Linux kernel is monolithic.

There is a saying, that "Those who don't understand UNIX are condemned to reinvent it, poorly". If one looks at the Linux desktop, one will realise, that it's also true for desktop operating systems.

Install Linux!

Tux is the mascot for Linux.

Linux experts are able to use the command line.

My laptop is running Linux.

I'm running Linux on my laptop.

Ubuntu is a popular Linux distribution.