/kick ID
/kicklast
/ban ID
/banip IP
/unban IP
/banlast
/unbanlast
/addbot bot name
/addbot1-5 bot name
/setteam1-5 ID
/adm nick/ID
/admip IP
/unadm IP
/adminlog pass
/friendlyfire 0/1
/pause
/unpause
/bonus 0-5
/vote% 0-100
/map map
/nextmap
/restart
/shutdown
/timelimit minutes
/limit x
/maxplayers x
/password pass
/respawntime seconds
/maxrespawntime seconds
/say message
/gmute ID
/ungmute ID
/loadcon
/loadlist xxx.txt
/loadwep xxx.ini
/lobby
/gamemode 0-6
/advance 0/1
/realistic 0/1
/survival 0/1
I'm not sure if all of them work on server 2.6.1.