mesg - Wikipedia

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mesg
Original author(s)	Dennis Ritchie, Ken Thompson
Developer(s)	AT&T Bell Laboratories
Initial release	November 3, 1971; 52 years ago (1971-11-03)
Operating system	Unix and Unix-like
Type	Command

mesg is a Unix command that sets or reports the permission other users have to write to the current user's terminal using the talk and write commands.

Usage[edit]

It is invoked as:

mesg [y|n]

The 'y' and 'n' options respectively allow and disallow write access to the current user's terminal. When invoked with no option, the current permission is printed.

Input redirection may be used to control the permission of another TTY. For example:

% mesg
is y
% tty
/dev/tty1
% mesg < /dev/tty2
is y
% mesg n < /dev/tty2
% mesg < /dev/tty2
is n
% mesg
is y

References[edit]

mesg – Shell and Utilities Reference, The Single UNIX Specification, Version 4 from The Open Group

v t e Unix command-line interface programs and shell builtins
File system	cat chattr chmod chown chgrp cksum cmp cp dd du df file fuser ln ls mkdir mv pax pwd rm rmdir split tee touch type umask
Processes	at bg crontab fg kill nice ps time
User environment	env exit logname mesg talk tput uname who write
Text processing	awk basename comm csplit cut diff dirname ed ex fold head iconv join m4 more nl paste patch printf read sed sort strings tail tr troff uniq vi wc xargs
Shell builtins	alias cd echo test unset wait
Searching	find grep
Documentation	man
Software development	ar ctags lex make nm strip yacc
Miscellaneous	bc cal expr lp od sleep true and false
Categories Standard Unix programs Unix SUS2008 utilities List

Usage[edit]

See also[edit]

References[edit]