ok inferno this is what to do to get a list of commands, in halo press ~, then press tab, it will give a list of commands, but i will also post all of the commands.
From Bungie.Com
cls
Clear the console text.
help [command]
Tell you about the command.
quit
Quit Halo for the PC dedicated server.
sv_ban [player name or index]
Ban the player with the given name or index. However, this doesn't kick them out of the game however.
sv_ban_penalty [time1] [time2] [time3] [time4]
Specifies the levels of punishment for repeat offenders. The first offense will be punished for [time1], the second offense for [time2], the third offense for [time3], the fourth offense [time4] and the fifth offense for an indefinite period of time (the administrator has to unban the user). The format of time is n s, n m, n h, n d or 0. n is a digit in the 1-9 range and 0 is infinite.
sv_banlist
Show the list of the banned players.
sv_banlist_file
Specifies the file to store and load the ban list to and from. Note: this file's name is restricted to banlist ## .txt where ## is a two digit number. This allows multiple instances to use different ban lists while still restricting the name of the ban list (for security purposes).
sv_end_game
End the currently running game. This will proceed to the next game in the map cycling game entries list.
sv_kick [player index or name]
Kick the player with the given name or index out of the game.
sv_map [map name] [game variant]
Start a game with the indicated map and game variant. When the game is over, this game will restart itself. This command supersedes any map cycle the server has.
sv_mapcycle
Show game list.
sv_mapcycle_add [map name] [game variant]
Append this game entry (map name and game type) to the end of the game list.
sv_mapcycle_begin
Start the map cycling with the specified game entries.
sv_mapcycle_del [index]
Delete the game entry from the map cycling game list (use sv_mapcycle to get game IDs).
sv_mapcycle_timeout n
Time in seconds to restart the next game in the game list after game is finished (this determines how long clients are sitting at the post carnage report screen).
sv_map_next
End the current game and skip to the next game in the map cycling game entries list.
sv_map_restart
Restart the game.
sv_maxplayers n (Default value is 16)
Set the maximum number players. This should be done in the init.txt file, before map cycling begins.
sv_name [string] (Default value is "Halo")
Set the server name (64 characters max). This should be done in the init.txt file, before map cycling begins. With the 1.03 update, the set of characters allowed for server names is no longer limited to alphanumeric characters.
sv_password [string]
Set password for server. This should be done in the init.txt file, before map cycling begins.
sv_players
List the players and their indices for reference in banning and kicking players from the dedicated server. With v1.03, sv_players also shows the number of TKP per players and their cool down period (as appropriate).
sv_public [1, 0] (Default value is 1)
Determine if the server will be listed in the GameSpy Master Server list (1) or not (0). This should be done in the init.txt file, before map cycling begins. Note: setting this to false is equivalent to hosting a LAN game.
sv_rcon_password [string]
Set the RCon password. To remove the password, thus disabling RCon, specify an empty string "" as the password.
sv_status [1, 0]
Displays the current status of the dedicated server in the console.
sv_tk_ban n
Specifies the number of "team kill points" required for a player to be kicked and banned from a server. See section H for additional information about Controlling Team Killing and Banning undesirable players.
sv_tk_grace [time]
Set the grace period during which a player can only be credited with one TKP. For example, if set to 3s, a player can only be credited for one team kill every 3 seconds, preventing an accidental grenade explosion from crediting multiple TKP to a player.
sv_tk_cooldown [time]
Set the cool down period after which a player will be forgiven one TKP if they have not committed another team kill.
sv_unban [player name]
Allow the player with the given name to join the server again
and there you go everysingle command on console, oh BTW some only work on dedicated servers, like sv_mapcycle add etc, but sv_map works in both kinds of servers, just do "sv_map bloodgulch slayer".
