Muitos linux'es suportam o comando de serviço
service mysql.server start
Isso está relacionado ao chkconfig
[root@iceweasel init.d]# chkconfig --list mysql.server
Note: This output shows SysV services only and does not include native
systemd services. SysV configuration data might be overridden by native
systemd configuration.
mysql.server 0:off 1:off 2:on 3:on 4:on 5:on 6:off
Caso contrário, você pode fazê-lo à moda antiga
cd /etc/init.d
./mysql.server start