Find Plesk Version

To find Plesk version, login to server as user root SSH and run

plesk version

Example

root@root861:~# plesk version
Product version: Plesk Onyx 17.9.8
     Build date: 2018/11/16 16:00
     OS version: Debian 9.6
       Revision: 6af2ef23569cac03e01272676158a016ed0eea1a
   Architecture: 64-bit
Wrapper version: 1.2
root@root861:~#