wall
write a message to users
see also :
mesg - write - shutdown
Synopsis
wall [-n]
[-t TIMEOUT] [file]
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examples
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description
Wall displays the
contents of file or, by default, its standard input,
on the terminals of all currently logged in users. The
command will cut over 79 character long lines to new lines.
Short lines are white space padded to have 79 characters.
The command will always put carriage return and new line at
the end of each line.
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.
options
-n, --nobanner
Supress banner
-t,
--timeout TIMEOUT
Write timeout to terminals in
seconds. Argument must be positive integer. Default value is
300 seconds, which is a legacy from time when people ran
terminals over modem lines.
-V,
--version
Output version and exit.
-h,
--help
Output help and
exit.
availability
The wall command is part of the util-linux package and is
available from ftp://ftp.kernel.org/pub/linux/utils/util-linux/.
util-linux April 2011 util-linux
h-
--help
Output help and exit.
t-
--version
Output version and exit.
history
A wall command appeared
in Version 7 AT&T UNIX.
see also
mesg , talk, write ,
shutdown