Linux -the best Operating System ever- celebrates today 25 years since it was announced on August 25th, 1991 by the Finnish developer Linus Torvalds. The Internet we are used to is powered by thousands of servers running Linux. Also, Linux is present in mobiles, embedded devices, NAS, laptops and super-computers.
But… what is exactly Linux? In short, Linux is the kernel (the core software that permits hardware to translate primitive orders into actions via software/hardware), but, if speak about that kernel plus the necessary utilities to meet the user’s needs we should formerly refer that as GNU/Linux. Hey, hey… one moment… So, now what is GNU? It drives to introduce you to the GNU Project. You can read an extensive explanation of what it is in that link, but, for our straight to the point matter I’ll tell you that such GNU project has been responsible to provide a lot of software that we can find in the GNU/Linux distributions (Debian, Fedora, Ubuntu, Slackware, Arch Linux, etc). This mix of Linux and GNU occurred in 1992, when Torvalds released its project -Linux- as free software and it was adopted by the GNU project -leaded by Richard Stallman.