How to obtain Parallels Plesk Panel for Linux/Unix key

The license number can be retrieved using any of the following ways:

1. Plesk Panel

In Plesk Panel go to Server, License Management and see the license number there.
The key number is also shown at the top of the browser when you logged in Plesk panel as admin.

Key CP

2. Command line

Run the following command in shell as root:

cat /etc/psa/psa.key | grep PLSK

Get Parallels Plesk Control Panel for Linux key