From LiteSpeed Repo
Install OpenLiteSpeed and PHP from LiteSpeed Repositories for CentOS 5, 6 & 7, and Debian/Ubuntu.
From Source Code
Install OLS and PHP from source code at the command line.
Installation from script
1-Click Install
The easiest and fastest way to install OpenLiteSpeed, MariaDB, and WordPress on CentOS 5-7, Debian 7-9, and Ubuntu 12, 14, 16 with just one click.
DigitalOcean 1-Click WordPress Installation Upgrade
The easiest and fastest way to upgrade your DigitalOcean 1-click WordPress installation to OpenLiteSpeed, LSCache WordPress Plugin, with just another click.
4-Line Install
Four lines of script to install OLS for CentOS 6 with a build of PHP 5.4 that supports most web applications.