wall man page on Hurd

wall man page on Hurd

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WALL(1)				 User Commands			       WALL(1)

NAME
     wall — write a message to users

SYNOPSIS
     wall [-n] [-t TIMEOUT] [file]

DESCRIPTION
     Wall displays the contents of file or, by default, its standard input, on
     the terminals of all currently logged in users. The command will cut over
     79 character long lines to new lines. Short lines are white space padded
     to have 79 characters. The command will always put carriage return and
     new line at the end of each line.

     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 mes‐
     sages.

     Reading from a file is refused when the invoker is not superuser and the
     program is suid or sgid.

OPTIONS
     -n, --nobanner
		 Supress banner

     -t, --timeout TIMEOUT
		 Write timeout to terminals in seconds. Argument must be posi‐
		 tive integer. Default value is 300 seconds, which is a legacy
		 from time when people ran terminals over modem lines.

     -V, --version
		 Output version and exit.

     -h, --help	 Output help and exit.

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

HISTORY
     A wall command appeared in Version 7 AT&T UNIX.

AVAILABILITY
     The wall command is part of the util-linux package and is available from
     ftp://ftp.kernel.org/pub/linux/utils/util-linux/.

util-linux			 April 2011			    util-linux

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