65 thousand dollar question Post: 84752

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The Lounge What is on Your Mind? 65 thousand dollar question Post 84752 by rhfrommn on Wednesday 28th of September 2005 11:29:09 AM

09-28-2005

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Commercial-grade unix is intended for companies to use for their critical business functions, not for hobbyists or home users. That is the context you need to be thinking of when you see those prices.

For example, at one of my previous jobs we ran a database for one of our clients. That database had details on over 10 million of their customers and hundreds of millions of rows of data. The needed access to it almost 24/7 with 100% uptime except for scheduled outages. It ran on a half-million dollar server and had terabytes of expensive EMC disk arrays behind it. Paying thousands of dollars for a stable, secure, high-availablity OS is not even an issue in a situation like that. The cost of the OS is a drop in the bucket compared to the hardware, software licensing (oracle in this case) and penalties we would have had to pay for not meeting service level agreements due to outages.

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LEARN ABOUT XFREE86

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)