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The Command Block is a block made with the intent to support Adventure mode and will allow mapmakers to expand the interaction with the player through server commands. The block can run specified server commands when activated by redstone current. Considering its functionality, they will not be able to be crafted[1] and only administrators will be able to place them.[2] To be able to use this block in multiplayer, you must replace false by true on line enable-command-block in server.properties. If this line doesn't exist, you'll have to add it. Currently, it is not in creative mode inventory.

Usage

The Command Block will execute server commands like giving items or experience to a player.[3]

To change the command executed by the block, simply right-click it, and a GUI will open.

In place of player names, it is possible to use multiple different shorthands:

Shorthand Function
@p Nearest player
@r Random player
@a All players

When using commands, treat them as if entered from the console - you always need to specify the target, so it is not possible to use commands such as "kill" which do not take a player argument.

So for example, to change the mode to survival for the nearest player:

/gamemode survival @p

Note that you will have to be in Creative Mode to change the command associated with the block.

Disabled commands

As of 12w32a, these commands have been disabled for the Command Block.

Command Reason for being disabled
/kick Due to @a, this could be used to lock out a server from entries.
/ban
/op So players cannot OP themselves.
/deop So players cannot deop OPs.
/stop So players cannot shut down a server.
/tell So players can't spam the /tell command*
  • However "/me" command still works and allows to broadcast messages server-wide. Command block identifies itself as "@". Worth noting is the fact that "/me" command, is an example of command without player target that actually works with Command block.

History

On July 27th, 2012, Jeb began tweeting of a new block he had created to start expanding Adventure mode.[4] He began posting pictures, ideas and hints of what the block will be able to do. During Notch's AMA he hinted the block may be in 1.4.[5]

u
12w32aAdded Command Block, plus a number of new commands for the block to use.

Gallery

References

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