WALL(ADM)                            UNIX System V



     Name
          wall - writes to all users


     Syntax
          /etc/wall


     Description
          wall reads a message from the standard input until  an  end-
          of-file.   It then sends this message to all users currently
          logged in preceded by ``Broadcast Message from ...''.   wall
          is  used  to  warn all users, for example, prior to shutting
          down the system.

          The sender should be super-user to override any  protections
          the users may have invoked.


     Files
          /dev/tty*


     See Also
          mesg(C), write(C)


     Diagnostics
          Cannot send to ...  The  open  on  a  user's  tty  file  has
                              failed.


     (printed 2/15/90)                                  WALL(ADM)