Date: Fri, 17 Jan 1997 13:17:23 +0100 (MET) From: Zahemszky Gabor <zgabor@CoDe.hu> To: freebsd-questions@freebsd.org (FreeBSD questions) Subject: Re: Crontab for killing and restarting named Message-ID: <199701171217.NAA00500@CoDe.hu> In-Reply-To: <199701170922.BAA09807@connectnet1.connectnet.com> from That Doug Guy at "Jan 17, 97 01:21:26 am"
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> Ok, this is driving me nutty. I need to kill named once a day, and then
> restart it. First I tried a command line to do this in the crontab, but I couldn't get
> that to work, so I decided to use a script. Here is the script that I ended up with:
>
> #!/bin/sh
> PID=`/bin/ps ax | /usr/bin/grep named | /usr/bin/grep -v grep | /usr/bin/awk
> '{print $1}'`
> /bin/kill -9 ${PID}
> /bin/sleep 5
> /usr/sbin/named
>
> The only problem is, it doesn't work properly. When I run it from the command
Yes, because it's name contains ``named'', too, and awk find it.
1) I found it in AEllen Frisch's Essential System Administration:
instead of:
.... | grep foo | grep -v grep
it would be good:
.... | grep '[f]oo'
It's cheaper, because it uses only 1 grep process, and 1 pipe, not two of
them. (And if you use grep in the original instead of fgrep, the time and
memory are ~ same.)
2) Your problem has a much cheaper solution:
kill -9 `cat /var/run/named.pid`
in your script, or use the systems
/usr/sbin/named.restart
or
/usr/sbin/ndc restart
scripts, designed for this problem.
Bye, Gabor
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