MESG(1)      <?><?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?>      MESG(1)

<?><?><?><?><?>
       mesg - <?><?><?><?><?><?><?><?><?> (<?><?><?> <?><?>
       <?><?><?><?><?><?><?><?><?>) <?><?><?><?><?><?> <?><?>
       <?><?><?><?><?><?> <?><?><?><?><?><?><?><?><?>

<?><?><?><?>
       mesg [<?><?><?><?><?><?>] [n|y]

<?><?><?><?>
       <?><?><?><?><?><?><?><?> mesg <?><?><?><?><?><?><?><?>
       <?><?><?><?><?><?> <?><?> <?><?><?><?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?> <?><?><?><?><?><?> <?><?><?><?> <?><?><?><?><?>
       <?><?><?><?><?> <?><?><?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?>
       <?><?><?><?> <?><?> <?><?><?><?><?><?><?><?><?> <?><?>
       <?><?><?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?>
       <?><?><?><?><?><?>. <?><?><?> <?><?> <?><?><?><?><?><?><?>
       <?><?><?><?><?><?> <?><?><?><?><?><?><?><?>, <?><?><?><?>
       <?><?><?><?><?><?><?><?> <?><?><?> <?><?><?> <?><?> talk(1) <?>
       write(1) <?><?><?><?> <?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?>
       <?><?> <?><?><?><?><?><?><?><?><?>.

       Traditionally, write access is allowed by default. However, as users
       become more conscious of various security risks, there is a trend to
       remove write access by default, at least for the primary login shell.

       The initial permissions for the terminal are set by login(1) according
       to TTYPERM and TTYGROUP from /etc/login.defs. The default is mode 0620
       if a tty group is used, and 0600 without the group. The default tty
       group name is "tty".

       To ensure that your ttys are set in a portable and independent manner
       from system settings, mesg should be executed in your login scripts.

       mesg modifies the write permissions for a group on the current terminal
       device. Since version 2.41, mesg can no longer be compiled to make the
       terminal writable for others and strictly modifies only group
       permissions. The usual setup is to use a "tty" group and add relevant
       users to this group. Alternatively, a less secure solution is to set
       utilities like write(1) or wall(1) to setgid for the "tty" group.

       <?><?><?><?><?><?><?><?> mesg <?><?><?><?> <?><?><?><?><?><?> <?><?>
       <?><?><?><?><?><?> <?><?><?><?><?><?> 2 <?><?><?> <?><?> <?><?>
       <?><?><?><?><?><?> <?><?> <?><?><?><?><?><?><?><?><?>. <?> <?><?><?><?>
       <?><?><?><?><?><?><?> <?><?><?><?><?><?><?><?><?><?> mesg <?><?>
       <?><?><?><?><?><?><?><?><?><?>. <?><?><?><?><?><?> <?><?><?><?><?><?>
       <?><?><?><?><?><?><?> --verbose <?><?><?><?><?><?><?><?><?> ,,mesg"
       <?><?> <?><?><?><?><?><?> <?><?><?><?><?><?><?><?><?> <?> <?><?><?><?>
       <?><?><?><?><?><?><?><?><?>. <?><?><?> <?><?><?><?><?><?><?><?> <?><?>
       <?><?><?><?><?><?><?> <?> <?><?><?><?><?><?> 2.33.

<?><?><?><?><?><?><?><?><?>
       n
           <?><?><?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?>.

       y
           <?><?><?><?><?><?><?> <?><?> <?><?><?><?><?><?> <?><?><?><?>
           <?><?><?><?><?><?><?><?><?>.

       <?><?><?> <?><?><?><?> <?><?><?><?> <?><?><?><?><?><?><?><?><?>, mesg
       <?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?><?> <?><?><?><?><?>
       <?><?><?><?><?><?> <?><?> <?><?><?><?><?><?>
       <?><?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?>.

<?><?><?><?><?><?>
       -v, --verbose
           <?><?><?><?><?><?><?><?><?> <?><?><?> <?><?> <?><?><?><?><?><?><?>.

       -h, --help
           <?><?><?><?><?><?><?><?><?> <?><?><?><?><?> <?><?><?><?><?><?> <?>
           <?><?><?><?><?><?>.

       -V, --version
           Display version and exit.

<?><?><?><?><?><?><?> <?><?><?><?><?>
       mesg <?><?><?><?><?><?> <?><?> <?><?><?><?><?><?> <?><?>
       <?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?><?><?>:

       0
           <?><?><?><?><?><?> <?><?> <?><?><?><?><?><?><?><?><?>.

       1
           <?><?><?><?><?><?> <?><?><?><?> <?><?><?><?><?><?><?><?><?>.

       >1
           <?><?><?><?><?> <?><?> <?><?> <?><?><?><?><?><?>.

<?><?><?><?><?><?><?><?>
       /dev/[pt]ty*, /dev/pts/[0-9]*

<?><?><?><?><?><?><?><?><?>
       mesg (I) <?><?> <?><?><?><?><?><?><?><?><?> <?> UNIX
       <?><?><?><?><?><?><?><?> <?><?> <?><?><?><?><?><?><?><?><?><?>.
       <?><?><?><?><?><?><?> <?><?> <?><?> <?><?><?><?><?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?><?><?> <?><?><?><?><?> <?><?><?>
       <?><?><?><?><?><?><?><?><?><?> <?><?><?> <?><?><?><?><?><?><?> 7 AT&T
       UNIX-<?>.

<?><?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?>
       login(1), talk(1), write(1), wall(1), xterm(1)

<?><?><?><?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?>
       For bug reports, use the issue tracker
       <https://github.com/util-linux/util-linux/issues>.

<?><?><?><?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?> mesg <?><?> <?><?><?> <?><?><?><?><?><?>
       ,,util-linux" <?><?><?><?> <?><?> <?><?><?><?> <?><?><?><?><?><?><?><?>
       <?><?> <?><?><?><?><?><?> <?><?><?><?><?><?> <?><?><?><?><?><?><?>
       <https://www.kernel.org/pub/linux/utils/util-linux/>.

util-linux 2.41                   2025-03-29                           MESG(1)