WALL(1) BSD General Commands Manual WALL(1) NAME wall — write a message to users SYNOPSIS wall [file] DESCRIPTION Wall displays the contents of file or, by default, its standard input, on the terminals of all currently logged in users. 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 mes- sages. Reading from a file is refused when the invoker is not superuser and the program is suid or sgid. 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-ng package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/. Linux 0.99 March 8, 1993 Linux 0.99
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