WALL(1) | General Commands Manual | WALL(1) |
wall
— write a
message to users
wall |
[-g group]
[file] |
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
A wall
command appeared in PWB UNIX.
The sender's LC_CTYPE
setting is used to
determine which characters are safe to write to a terminal, not the
receiver's (which wall
has no way of knowing).
February 24, 2012 | macOS 14.6 |