General Settings
Map
You can change the current map to any stock one.
rcon changelevel mapnamehereYou can also use maps from the Steam Workshop. Just enter the file ID (in the URL after id=) after the command.
rcon host_workshop_map fileIDTo restart the map after X seconds:
rcon mp_restartgame secondsPassword
You can change or remove the password for joining your server by leaving the value blank.
rcon sv_password ""