wall

NAME

SYNOPSIS

DESCRIPTION

displays the contents of or, by default, its standard input, on the terminals of all currently logged in users.
Only the super-user can write on the terminals of users who have chosen to deny messages or are using a program which automatically denies messages.
Reading from a file is refused when the invoker is not superuser and the program is suid or sgid.

SEE ALSO

mesg(1) talk(1) write(1) shutdown(8)

HISTORY

A command appeared in

AVAILABILITY

The wall command is part of the util-linux-ng package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/.