locate *mysql.service*
/etc/systemd/system/
systemctl daemon-reload systemctl restart mysql
/etc/systemd/system/mysql.service # MySQL systemd service file [Unit] Description=MySQL Community Server After=network.target After=syslog.target [Install] WantedBy=multi-user.target [Service] User=mysql Group=mysql PermissionsStartOnly=true ExecStartPre=/usr/share/mysql/mysql-systemd-start pre ExecStart=/usr/bin/mysqld_safe ExecStartPost=/usr/share/mysql/mysql-systemd-start post TimeoutSec=600 Restart=on-failure RuntimeDirectory=mysqld RuntimeDirectoryMode=755 LimitNOFILE=2048
[Service] LimitNOFILE=2048
