SSH into the machine. Using the proper credentials and ip address, ssh [email protected]. This should provide you with shell access to the Ubuntu server.
Restart the mySQL service. sudo service mysql restart should do the job.
If your mySQL service is named something else like mysqld you may have to change the command accordingly or try this: sudo /etc/init.d/mysql restart
sudo service mysql stop;
sudo service mysql start;
If the above process will not work let’s check one the given code above you can stop Mysql server and again start server