Linux based dedicated servers offer a fast hosting solution that is known for cost-effective hosting solutions that power multiple databases and boost your website's performance.
If you run a Wordpress, PHP based script, Python, Noje.Js web project etc, a Linux based OS ( CentOS, Debian, Fedora, Ubuntu ) will be best options for your cheap dedicated server. While Windows OS based dedicated servers are best suited for applications based on MySQL, .NET, ASP & MSSQL.