[mrtg] Suppressing command-line errors, using perl scripts

Fri Jan 20 17:53:46 MET 2006

Hi all,

I just got into using Perl scripts on remote servers and MRTG.  One
remote script, which uses this command-line command:

"netstat -a -n | grep -E "^(tcp)"| cut -c 68-|sort|uniq -c | sort -n |
grep TIME_WAIT"

Is causing a bunch of messages to be sent to the MRTG server that look
like this:

------------------------------------------------

...

...

Subject: Cron <user at server> /etc/mrtg/all-ip

X-Cron-Env: <SHELL=/bin/sh>

X-Cron-Env: <HOME=/home/user>

X-Cron-Env: <PATH=/usr/bin:/bin>

X-Cron-Env: <LOGNAME=user>

warning, got bogus tcp line.

---------------------------------------------

I know these warnings are returned by the remote server's command shell,
and not directly caused by the Perl script, nor actually passed as one
of the 4 values (In, Out, Host, Uptime) to the snmp collector, so is
there a way of suppressing these warnings?  Is it done within the Perl
script, or within MRTG?

Thanks a ton!

Spencer

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