You could need to restart MySQL server after installing, upgrading, or making some changes in my.cnf file in Linux. The quickest way to this is by typing on the command line terminal. No fancy graphic interface.
MySQL Server Restart General Syntax
The syntax is as follows. On the Linux or OS X type the following on the shell prompt:
MySQL Server Restart Using Systemd Manager
Alternatively you could restart MySQL by sending control commands to the systemd manager.
systemctl start mysqld
systemctl stop mysqld
systemctl restart mysqld
FreeBSD Unix server users could use the following syntax to start/stop/restart the server.
On OS X to start/stop/restart MySQL from the command line, as this article states
sudo /usr/local/mysql/support-files/mysql.server start
sudo /usr/local/mysql/support-files/mysql.server stop
sudo /usr/local/mysql/support-files/mysql.server restart