1. Check Installation Requirements

Before you install Plesk on a server, make sure you meet the following requirements.

Requirements for Linux Systems

We recommend that you install Plesk on a clean operating system. Before installing Plesk for Linux, make sure that the following requirements are met:

Requirements for Windows Systems

Before installing Plesk for Windows, back up all your server data and make sure that the following requirements are met:

Note: If you already have MS SQL server installed on the server where you are going to install Plesk, there is no need to install MS SQL again. You can install Plesk without the MS SQL component and register your existing MS SQL server in Plesk as an external database server. For details, refer to Administrator's Guide, section Connecting to External Databases (Windows).

Note: During Plesk installation, the following ports are opened: https://support.plesk.com/hc/en-us/articles/213932745.