This tutorial will show you how to unlock your Plesk control panel installed on a Linux / Unix server, in case you have tried several times to login to it with wrong credentials.
By default if the Plesk has been locked it takes about thirty minutes until you will have ability to try to login again. This is set to prevent bruteforce attacks against your control panel.
Unlocking Plesk can be done via SSH using Putty or other terminal client.
Access your server and switch to super user (root) then type:

