wall — send a message to everybody’s terminal.
[ message ]
sends a message to everybody logged in with their
The message can be given as an argument to
or it can be sent to
standard input. When using the standard input from a terminal,
the message should be terminated with the
key (usually Control-D).
The length of the message is limited to 20 lines.
For every invocation of
a notification will be written to syslog, with facility
changing it to "Remote broadcast message".
This option is only available for root if
is installed set-group-id, and is used by
variable – the time printed in the banner is based on the system’s
Miquel van Smoorenburg, [email protected]