LINUX is an open-source operating system which allows users to modify kernel as per their requirement. This facilitates the different part of Linux to be deployed, modified and tested by a different organization. This result in multiple flavors of Linux available in the market and each has its own feature. Major Linux distributions are as below:- Ubuntu: It’s the most common and well-known distribution. It has lots of ree installed apps for user’s easiness. It’s very easy to use and available in the command line and GUI both. Red Hat Enterprise: Red Hat Enterprise Linux or RHEL is commercial Linux distribution. It stale, tested, user-friendly and most important NOT free to use. Debian: Debian is one of the fastest and user-friendly Linux version. Linux Mint: Its a special type of distribution works on the windows system as well. This for beginners to get hands-on the Linux system. Fedora: Fedora is not in use on high numbers due to less stability. It supports a GNOME3 desktop environment by default.