Linux is an OS, which isn't that common for desktop machines, but is amongst the most commonly used OSs for servers. It is totally free, so you shall not have to pay any license charges as part of your web hosting payments. Linux is furthermore considered to be the most risk-free Operating System these days and due to the permissions which files have as well as the file types that can be run, virus files that can infect a regular PC will simply not be executed on a Linux-based web server. In addition, the OS is 100 % free, so it could be altered with no limits, so that it will match the requirements of the web hosting company and their customers. This implies that unneeded software packages can be removed to make the OS lighter and a lot quicker, that may directly contribute to significantly better hosting server performance. Many Linux machines have the Apache web server set up on them, as this software is also totally free, fast and reliable. It's the most widely used web server available and is a part of the LAMP bundle that numerous script applications, like Joomla™ and WordPress, require. LAMP is an abbreviation for Linux, Apache, MySQL and PHP.
Stable Linux with Apache in Shared Web Hosting