Linux is a free and open-source Unix-like operating system typically packaged in a form known as a Linux distro (distribution) for both desktop and server use. Some of the most popular and mainstream Linux distros are Arch Linux, CentOS, Debian, Fedora, Gentoo, Mint, Mageia, openSUSE and Ubuntu. The Android OS is Linux kernel-based and used by many smartphones and tablets, as is the Chromebook. We are very experienced with Linux and use it daily on all of our servers.