Are there any shortcuts for the serverLock command?

Yes, you can use ";slock" as a shorthand.

What rank do I need to use the serverLock command?

You need the Head Admin rank or higher in HD Admin to use this command.

Type ;serverLock [Rank] in the chat while playing a game with HD Admin installed.

No, this command only works in games that have the HD Admin plugin installed by the game developer.

HD Admin Head Admin

The serverLock command locks the game for players with a rank lower than that specified.

This command locks the game for players with a rank lower than that specified.

;serverLock [Rank]

Example: ;serverLock

This command locks the game for players with a rank lower than that specified. The player cannot move until the effect is reversed.