Most common version of UNIX on production systems Post: 302091927

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Top Forums UNIX for Dummies Questions & Answers Most common version of UNIX on production systems Post 302091927 by BOFH on Thursday 5th of October 2006 11:03:18 PM

10-06-2006

Registered User

Hmm, most of the scripts I write use ksh but I admin mainly Solaris boxes. The fun part is trying to create scripts that work equally as well in multi platform environments.

As to which Solaris, the shop I'm in now is a mixture of Solaris 2.6 up to Solaris 10 in a few cases (about 250 or so Solaris boxes). We also run Suse and Red Hat, AIX and a few HP-UX systems. The last shop I was in (I'm a consultant) used exclusively Solaris 8 with various versions of Red Hat (ES and AS) and AIX.

I have three Sun boxes here at home with Solaris 8, 9 and 10. I'd say that if you teach 9, the info will work pretty closely with 8. There are some system level changes in 10 that tend to catch me from time to time and I have to go look things up. They're good changes but different enough from 9 and lower that I have to stop and think for a second. So if you teach 10, a shop with 8 might catch your students by surprise.

Carl

BOFH

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mesg

MESG(1)                                                            User Commands                                                           MESG(1)

NAME

       mesg - display (or do not display) messages from other users

SYNOPSIS

       mesg [option] [n|y]

DESCRIPTION

       The mesg utility is invoked by a user to control write access others have to the terminal device associated with standard error output.  If
       write access is allowed, then programs such as talk(1) and write(1) may display messages on the terminal.

       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.  To make sure your ttys are set the way you want them to be set, mesg
       should be executed in your login scripts.

ARGUMENTS

       n      Disallow messages.

       y      Allow messages to be displayed.

       If no arguments are given, mesg shows the current message status on standard error output.

OPTIONS

       -v, --verbose
              Explain what is being done.

       -V, --version
              Display version information and exit.

       -h, --help
              Display help text and exit.

EXIT STATUS

       The mesg utility exits with one of the following values:

            0     Messages are allowed.

            1     Messages are not allowed.

           >1     An error has occurred.

FILES

       /dev/[pt]ty[pq]?

SEE ALSO

       login(1), talk(1), write(1), wall(1), xterm(1)

HISTORY

       A mesg command appeared in Version 6 AT&T UNIX.

AVAILABILITY

       The mesg command is part of the util-linux package and is available from https://www.kernel.org/pub/linux/utils/util-linux/.

util-linux                                                           July 2014                                                             MESG(1)