Linux is an Operating System, that isn't that popular for desktop machines, but is one of the most frequently used OSs for web servers. It is 100 % free, so you will not need to pay any license fees as part of your website hosting payments. Linux is also regarded as the most risk-free OS around and thanks to the permissions which files have along with the file types that can be run, virus files which can easily infect a regular PC shall simply not be executed on a Linux-based web server. Also, the Operating System is freeware, so it can be altered with no restrictions, so that it will match the requirements of the hosting company and their customers. This also means that unwanted software packages can easily be removed to make the Operating system lighter and swifter, which could directly lead to a lot better server performance. Many Linux machines have the Apache web server installed on them, since this software is also 100 % free, quick and stable. It's the most popular web server available and is an element of the LAMP bundle that lots of script apps, such as Joomla™ and WordPress, need. LAMP is an abbreviation for Linux, Apache, MySQL and PHP.