Multiplayer server commands? Well, the simple ones are:
/set mod - change mod (must add .tbm to the end and it's case sensitive)
/set ed - engage distance
/set mf - max frames
/set tf - turn frames
/set dq 0/1 - turns disqualification on/off
/kick - kicks somebody
/op name - ops someone in the server
/deop name - deops someone in the server