wall1
Write a message to users
Usage
wall [-g
group]
[file]
Overview
The wall utility displays the contents of file 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.
-
-g -
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.
Releases
165 releases since Mac OS X 10.0; the text changed 4 times.
-g since Mac OS X 10.3.