MacOS restart ssh Tips

 % sudo launchctl list | grep ssh
 % sudo launchctl load -w /System/Library/LaunchDaemons/ssh.plist 
 % sudo launchctl list | grep ssh                                
-	0	com.openssh.sshd
 % sudo launchctl unload /System/Library/LaunchDaemons/ssh.plist
 % sudo launchctl list | grep ssh                               
 % sudo launchctl load -w /System/Library/LaunchDaemons/ssh.plist
 % sudo launchctl list | grep ssh                                
-	0	com.openssh.sshd
 % sudo systemsetup -getremotelogin 
Remote Login: On
 %