linux man page for wall

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

NAME
     wall -- write a message to users

SYNOPSIS
     wall [-n] [file]

DESCRIPTION
     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.

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

OPTIONS
      -n Supress banner

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/.

Linux 0.99							   March 8, 1993							Linux 0.99