WALL(1) UNIX Programmer's Manual WALL(1) NNAAMMEE wall - write to all users SSYYNNOOPPSSIISS wwaallll DDEESSCCRRIIPPTTIIOONN _W_a_l_l reads its standard input until an end-of-file. It then sends this message, preceded by `Broadcast Message ...', to all logged in users. The sender should be super-user to override any protections the users may have invoked. FFIILLEESS /dev/tty? /etc/utmp SSEEEE AALLSSOO mesg(1), write(1) DDIIAAGGNNOOSSTTIICCSS `Cannot send to ...' when the open on a user's tty file fails. Printed 7/9/88 April 29, 1985 1