Adds or removes a player from the whitelist, where only whitelisted players can join the game. Enter nothing for “player” when using “get” to print a list of all whitelisted players. An empty whitelist disables the whitelist functionality allowing anyone to join.
Enable/Disable peaceful mode. Enabling peaceful mode prevents biter attacks until provoked. Substitute true for false to disable. Already existing biters are not affected by this command so attacks could continue for a while after activating peaceful mode.