wall —
write a message to users
wall displays the contents of
file, or, by default, its standard input, on
the terminals of all currently logged in users.
Only the superuser can write on the terminals of users who have chosen to deny
messages or are using a program which automatically denies messages.
The options are as follows:
-
-
-g
group- Send messages to users in this group. This option may be specified
multiple times, and any user in any of the specified groups will receive
the message.
Since the sender's
locale(1) need
not match the receivers' locales,
wall
deliberately ignores the
LC_CTYPE
environment variable and allows ASCII printable and space characters only.
Non-printable characters and UTF-8 characters are replaced with question
marks.
mesg(1),
talk(1),
write(1),
shutdown(8)
A
wall command appeared in
Version 7 AT&T UNIX.
![[OpenBSD]](/openbsd.gif){kind=small}