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/.

util-linux                                        April 2011                                           WALL(1)()