Why is not it possible to restart MySQL service from Plesk administrator panel on Linux? How to restart it from the command line?
MySQL service is critical for the work of Plesk. If MySQL is stopped via Plesk administrator panel, Plesk will immediately get inaccessible and there will be no way to start it back from administrator panel. To avoid this, managing of MySQL service is only allowed from the command line.
In order to restart MySQL service:
Connect to Plesk server via SSH
Restart MySQL service:
# service mysql restart || service mariadb restart || service mysqld restart