wall(1M)							      wall(1M)

NAME
       wall - write message to all users

SYNOPSIS
       groupname] [file]

DESCRIPTION
       Without	arguments,  the	 command  reads	 a message from standard input
       until end-of-file.  Then it sends this message to all currently logged-
       in users preceded by:

       If  the option is specified, sends the message to all currently logged-
       in groupname members (as specified in preceded by:

       If file is specified, reads file instead of standard input.

       is typically used to warn all users prior to shutting down the system.

       The sender must have appropriate privileges to override any protections
       the users may have invoked (see mesg(1)).

       has timing delays, and takes at least 30 seconds to complete.

       You  must have appropriate privileges to override any protections users
       may have invoked (see mesg(1)).

EXTERNAL INFLUENCES
   International Code Set Support
       Single- and multibyte character code sets are supported.

DIAGNOSTICS
       The open on a user's tty file failed.

WARNINGS
       The command will be WITHDRAWN from X/Open standard and may not be  por‐
       table to other vendor's platforms.

AUTHOR
       was developed by AT&T and HP.

FILES
SEE ALSO
       mesg(1), write(1).

STANDARDS CONFORMANCE
								      wall(1M)

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