# wall(1) - man - phpMan

[WALL(1)](https://www.chedong.com/phpMan.php/man/WALL/1/markdown)                                     User Commands                                    [WALL(1)](https://www.chedong.com/phpMan.php/man/WALL/1/markdown)



## NAME
       wall - write a message to all users

## SYNOPSIS
       **wall** [**-n**] [**-t** _timeout_] [**-g** _group_] [_message_ | _file_]

## DESCRIPTION
       **wall** displays a _message_, or the contents of a _file_, or otherwise its standard input, on the
       terminals of all currently logged in users. The command will wrap lines that are longer than
       79 characters. Short lines are whitespace padded to have 79 characters. The command will
       always put a carriage return and new line at the end of each line.

       Only the superuser 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
       set-user-ID or set-group-ID.

## OPTIONS
### -n --nobanner
           Suppress the banner.

### -t --timeout
           Abandon the write attempt to the terminals after _timeout_ seconds. This _timeout_ must be a
           positive integer. The default value is 300 seconds, which is a legacy from the time when
           people ran terminals over modem lines.

### -g --group
           Limit printing message to members of group defined as a _group_ argument. The argument can
           be group name or GID.

### -V --version
           Display version information and exit.

### -h --help
           Display help text and exit.

## NOTES
       Some sessions, such as [**wdm**(1x)](https://www.chedong.com/phpMan.php/man/wdm/1x/markdown), that have in the beginning of [**utmp**(5)](https://www.chedong.com/phpMan.php/man/utmp/5/markdown) ut_type data a ':'
       character will not get the message from **wall**. This is done to avoid write errors.

## HISTORY
       A **wall** command appeared in Version 7 AT&T UNIX.

## SEE ALSO
       [**mesg**(1)](https://www.chedong.com/phpMan.php/man/mesg/1/markdown), [**talk**(1)](https://www.chedong.com/phpMan.php/man/talk/1/markdown), [**write**(1)](https://www.chedong.com/phpMan.php/man/write/1/markdown), [**shutdown**(8)](https://www.chedong.com/phpMan.php/man/shutdown/8/markdown)

## REPORTING BUGS
       For bug reports, use the issue tracker at <https://github.com/karelzak/util-linux/issues>.

## AVAILABILITY
       The **wall** command is part of the util-linux package which can be downloaded from Linux Kernel
       Archive <<https://www.kernel.org/pub/linux/utils/util-linux/>>.



util-linux 2.37.2                            2021-06-02                                      [WALL(1)](https://www.chedong.com/phpMan.php/man/WALL/1/markdown)