Linux is developed under the GNU General Public Licence and is Open Source operating system. Linux is availabe for free or for small cost. Most versions of Unix or Windows can be very expensive and Linux is equally good and customizable Operating System.

It is considered an excellent, low-cost alternative to other most expensive operating systems. Due to very nature of Linux's functionality and availability, it has become quiet popular worldwide and vast number of softwae programmers have taken Linux's source code and adapted it to meet their individual needs. At this time, there are dozens of ongoing projects for porting Linux to various hardware configurations and purpose.