Linux is an OS, that is not that popular for desktop machines, but is among the most popular OSs for web servers. It is totally free, so you will not have to pay any license charges as part of your web hosting payments. Linux is also thought to be the most risk-free Operating System out there and due to the permissions which files have as well as the file types that can be run, virus files which could infect an average PC shall simply not be executed on a Linux-based web server. In addition, the OS is totally free, so it could be modified with no constraints, in order to suit the needs of the website hosting company and their clients. This also implies that unnecessary software packages could be removed to make the OS lighter and swifter, which could directly contribute to a lot better server performance. Numerous Linux machines have the Apache web server installed on them, since this piece of software is also absolutely free, fast and secure. It's the most widely used web server out there and is part of the LAMP bundle that a great many script apps, like Joomla and WordPress, need. LAMP is an abbreviation for Linux, Apache, MySQL and PHP.