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NetBSD 6.1.5 - man page for wall (netbsd section 1)

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WALL(1) 			   BSD General Commands Manual				  WALL(1)

     wall -- write a message to users

     wall [-g group] [file]

     wall displays the contents of file or, by default, its standard input, on the terminals of
     all currently logged in users.

     Only the super-user can write on the terminals of users who have chosen to deny messages or
     are using a program which automatically denies messages.

     -g      Send messages to users in this group.  This option may be specified multiple times,
	     and any user in any of the specified groups will receive the message.

     mesg(1), talk(1), write(1), shutdown(8)

     A wall command appeared in Version 7 AT&T UNIX.  Support for -g was added in NetBSD 2.0
     (from OpenBSD 2.0).

BSD					  March 27, 2003				      BSD
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