NAME¶
wall —
write a message to users
SYNOPSIS¶
wall |
[-n]
[-t TIMEOUT]
[file] |
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.
SEE ALSO¶
mesg(1),
talk(1),
write(1),
shutdown(8)
HISTORY¶
A
wall command appeared in
Version 7
AT&T UNIX.
AVAILABILITY¶
The wall command is part of the util-linux package and is available from
ftp://ftp.kernel.org/pub/linux/utils/util-linux/.