Mesg

mesgDeveloper(s)| AT&T Bell Laboratories

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Initial release| November 3, 1971; 54 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 your terminal using the `talk` and `write` commands.

## Usage

It is invoked as:

mesg [y|n]

The 'y' and 'n' options respectively allow and disallow write access to your 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

## See also

* List of Unix commands

## References

* `mesg` – Commands & Utilities Reference, The Single UNIX Specification, Issue 7 from The Open Group

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Unix command-line interface programs and shell builtins

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Processes|

* at
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User environment|

* env
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* mesg
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* tput
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* who
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