Linux was first released in September 17, 1991 by Linus Torvalds. Strictly speaking Linux is just the kernel in the GNU/Linux operating system. Linux is the most installed OS in the world, that is mainly due to the fact that android use Linux as its OS. It is leading in pretty much all markets except for the desktop-market.
From a infosec perspective there are two reasons we should learn Linux. The first is that the majority of all servers in the world is running on Linux. And if we want to hack those servers we of course have to understand how they work. The second reason is that the vast majority of all hacking-tools are only available on Linux.
So in this chapter we are going to look at bit at some basic commands and basics of Linux.
