Allow me to split hairs here.
I was taught "sync;sync;sync;halt".
One for the father, one for the son, one for the holy spirit.
This, of course, in the days when I/O was slow enough that sync didn't
have time to finish before the halt, so doing it three times ensured
your file system shut down cleanly.
Dave
On 02/07/11 17:38, Devin Teske wrote:
On Mon, 2011-02-07 at 19:26 -0600, Adam Vande More wrote:
On Mon, Feb 7, 2011 at 7:13 PM, Devin Teske<dte...@vicor.com> wrote:
There's no technical reason to avoid using halt directly other
than the
fact that shutdown sends a message to connected users while
halt does
not.
--
Devin
P.S. I welcome the rebuttle as a learning experience if the
above is not
100% accurate and true (but be-warned... I went around the
office
polling _really_ old UNIX hands before making the above
statement).
I used to believe that until I was shown I was wrong. The easiest way
to see you're wrong is to drop to ttyv0 then do one of each like a
reboot then a shutdown -r now. In the latter case, you'll
notice /etc/rc.d/ and /usr/local/etc/rc.d/ stop scripts being
processed but not so in the former. In both types of shutdowns,
everything *should* exit cleanly but processes are terminated with
different signals and certain types of applications really need the
full rc stop script to end cleanly like HAST and CARP for example.
shutdown -r/p is a really good habit to form.
FWIW, someone also stated reboot on Linux behaves like shutdown -r now
so that I sure contributes to the confusion.
Thank you very much for the explanation!
Yes, I (we) had completely forgotten about the shutdown scripts.
Of course, many of us still remember the days when it standard fare to
"sync; sync; halt".
--
Devin
--
Adam Vande More
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--
Dave Robison
Sales Solution Architect II
FIS Banking Solutions
510/621-2089 (w)
530/518-5194 (c)
510/621-2020 (f)
da...@vicor.com
david.robi...@fisglobal.com
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