Saved admin password is incorrect [1/2]

This tutorial will help you fix this error you might get

/usr/local/psa/admin/plib/common_func.php3:151
psaerror(string 'Unable to connect to database: saved admin
password is incorrect.')

It applies to all Plesk distributions for Linux systems.

1. Start by logging in to your server via ssh as root user.

2. Stop MySQL server. In RedHat systems this is done usually like this

3. Open up your MySQL configuration file. Usually this file is called my.cnf and is in /etc directory.
4. Add this line into the [mysqld] section:

skip_grant_tables=1

5. Start MySQL server.