/Hide makes you hide so that no player can see you, when you will talk it come only in the Opchat
/xhide it says only that you Disconnected
/ohide [player] makes a other player hide
/follow [player] follow a player and you go hide
/kick [player] kick a player from the Server
/warn [player] warn a player, 2 warns later he become a kick
/votekick [player] you can vote kick a player or Player will stay
/ban [player] ban a player
/xban [player] ban the ip so that when he create a new account that he cant join
/tempban [player] [time] ban a player for a certain time
/newlvl [name from the map] 128 64 128 flat make a new map
/perbuild [rank] only that rank and higger ranks can build of this map
/promote [name] promote a player to the next rank
/demote [name] demote a player
/whowas [name] it shows ip,time of the Server, how many kick ...
/mb air [message] when you touch this block it send you a message
/b it show who that house build or who was griefing
/restart restart the server in 30 sek
/cmd set set a command to a rank
/pervisit only a rank and a higger rank can join of this map
/load [map] load a map
/allowguns allow guns on this map or not allow
/lastcmd show you what other player use commands last
/mute [player] mute a player so that he cant speak
/moderate only the owner can speak
/s [player] summon a player to you
/move [player] move a player to a other map
/loginmessage [player] gives player a login message
/logoutmessage [player] gives a player a logoutmessage
/title [player] gives a player a title
/tcolor [player] [color] gives a player a title color
/color [player] [color] gives a player a name color
/xundo [player]
/setspawn set a spawn
/adminium is a admin block, guest cant delete this block
/jail [Player] jailed the player
So that are the important commands for ops,admin,co-owner,owner