In the “Server Management” section (Servers menu, then choose a server), you will find the Manage Services option. From there you can control several important services for your application (Apache, Nginx, Mysql …).
How to start or stop services
To start any service, click on the “Start” button.
To stop any service, click on “Stop” button.
To restart any service, click on “Restart” button.
After restarting, you will be notified about the status.
How to purge or disable varnish
To start Varnish service, click on “Enable” button.
To stop Varnish service, click on “Disable” button.
To purge the Varnish cache from the server (i.e. if you have done some changes that you want to check immediately), click on the “Purge” button.