Linux is an Operating system which was developed in early 1990s by Linus Torvald at University of Helsinki in Finland . Then it was further joined & modified by group of thousands of computer geeks all around the world .Currently there are lots of Linux Distributions are available in the market like Redhat , Centos , Debian etc . But now Ubuntu server is becoming more popular in these day’s because it is easy to use & free . Following are the main sections of the course which contains different tutorials in detail.