Provided by: bsdutils_2.13-8ubuntu1_i386 bug

NAME

      wall - write a message to users

SYNOPSIS

      wall [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 mes‐
      sages.
 
      Reading from a file is refused when the invoker is not superuser and the
      program is suid or sgid.
      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-ng package and is available
      from ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/.