OS X : Terminal command to turn ON/OFF SSH server I know how to turn on SSH server from System preferences :-

(System preferences ->  Sharing -> Remote Login ) 

Now I am looking for a terminal command for the same. 

By knowing it I can use the command in my Python Script (for project work).
You can stop the ssh service by typing the following:

$ sudo launchctl unload  /System/Library/LaunchDaemons/ssh.plist 


To start it again, use this:

$ sudo launchctl load -w /System/Library/LaunchDaemons/ssh.plist