wall

PURPOSE

     Writes a message to all logged-in users.

SYNOPSIS
     wall

DESCRIPTION

     The  wall command  reads  a message  from standard  input
     until it reaches an end-of-file character.  It then sends
     the message to  all logged-in users preceded  by the fol-
     lowing heading:

       Broadcast Message from user

     To override any protections other  users have set up, you
     must be  operating with superuser  authority.  Typically,
     the superuser uses wall to warn all users of an impending
     system shutdown.

     Note:   This command  only  sends messages  to the  local
     node.

FILES

     /dev/tty*

RELATED INFORMATION

     The following commands:  "mesg,"  "su," and "write."