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Mac OS X Tiger in a Nutshell by Jason McIntosh, Chuck Toporek, Chris Stone, Andy Lester

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Name

wall

Synopsis

wall [file]

Writes to all users. wall reads a message from the standard input until an end-of-file. It then sends this message to all users currently logged in, preceded by "Broadcast Message from...." If file is specified, read input from that, rather than from standard input.

Option

-g group

Sends the output only to users in group group. This option may be repeated.

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