WALL(VIII) 4/10/75 WALL(VIII)





WALL(VIII)                   4/10/75                   WALL(VIII)







NAME

     wall  -  write to all users



SYNOPSIS

     /etc/wall



DESCRIPTION

     Wall reads its standard input until an end-of-file.  It then

     sends this message to all currently logged in users preceded

     by ``Broadcast Message ...''.  It is used to warn all users,

     typically 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 (I), write (I)



DIAGNOSTICS

     ``Cannot send to ...'' when the open on a  user's  tty  file

     fails.



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