Linux is an open source operating system. It is the most widely used operating system. it is considered as the secure operating system of all. As the operating system is open source, the source code is available and can be customized as per the requirements. Thus most of the internet facing business critical applications are hosted on Linux platforms. Also today lot of other platforms like Cloud computing or Devops also make use of Linux as their base operating system.

Similarly Linux is a favorite operating system in the embedded systems. The famous Android mobile operating system is a modified version of Linux operating system kernel.

Thus with the increase in the number of servers with Linux operating system installed, the demand for administrators to maintain these servers is also increasing. Thus the knowledge of Linux operating system is a must for anyone entering in the Information technology field.