Linux is an Operating System, that isn't that common for desktop machines, but is among the most popular OSs for servers. It's free of charge, so you shall not have to pay any license charges as part of your hosting payments. Linux is also considered to be the most risk-free OS nowadays and due to the permissions which files have and also the file types that can be run, virus files that may infect a normal computer system shall simply not be executed on a Linux-based server. Also, the OS is absolutely free, so it can be changed with no limits, as a way to match the requirements of the website hosting company and their clients. This also implies that unnecessary software packages can easily be removed to make the Operating system lighter and much faster, that can directly result in far better server performance. Many Linux machines have the Apache web server installed on them, due to the fact that this piece of software is also totally free, quick and stable. It's the most widely used web server available and is an element of the LAMP bundle that many script applications, including WordPress and Joomla, need. LAMP is an abbreviation for Linux, Apache, MySQL and PHP.
Stable Linux with Apache in Shared Web Hosting