Here I am explaining how you can access MySQL without knowing its password in a Plesk server.

# mysql -uadmin -p`cat /etc/psa/.psa.shadow`

The above command is used to access MySQL without prompting for a password.

In case, if you need to take backup of a database or you need to restore a database in a plesk server and you don’t know the MySQL root password, then you can follow the steps below:

# mysqldump -uadmin -p`cat /etc/psa/.psa.shadow` database_name > database.sql

# mysql -uadmin -p`cat /etc/psa/.psa.shadow` database_name < database.sql

That’s it!!

Related Links:
Reset mysql root password from command line
How to allow mysql client to access remote mysql databases