NAME

wall − write to all users

SYNOPSIS

wall [ −a ] [ file ]

DESCRIPTION

Wall reads its standard input until an end-of-file.  It then sends this message, preceded by ‘Broadcast Message ...’, to all logged in users.  Normally, ptys that do not correspond to rlogin sessions are ignored.   Thus when in suntools(1), the message appears only on the console window.  However -a will send the message even to such ptys. 

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

FILES

/dev/tty? 
/etc/utmp

SEE ALSO

mesg(1), write(1)

Sun Release 3.2  —  Last change: 16 March 1983