Hello,
The recommendation to use two commands is to have them run in parallel
instead of serial. Hence you can have multiple cron jobs running at the
same time. This suggestion didn't have any relationship with the errors
in your log file.
What are the contents of the files '/tmp/ping1_results.txt' and
'/tmp/ping2_results.txt'?
Also, please, paste you Monitorix log file.
Regards.
On 8/14/25 09:46, wilson rodrigues wrote:
Hello,
I have now separated two commands in two shell scripts and having error
repeating twice in log. I have installed fcron on my slackware system.
Use of uninitialized value $val in division (/) at /usr/lib64/monitorix/
gensens.pm line 156.
* * * * * root sh /root/bin/monitorix_ping1_gensens.sh
* * * * * root sh /root/bin/monitorix_ping2_gensens.sh
cat /etc/monitorix/conf.d/local.conf
# GENSENS graph
# Added on 2025-08-13
#
-----------------------------------------------------------------------------
<gensens>
<list>
0 = temp0
1 = temp1
</list>
<title>
0 = Pings1
1 = Pings2
</title>
<desc>
temp0 = /tmp/ping1_results.txt
temp1 = /tmp/ping2_results.txt
</desc>
<unit>
temp0 = 1
temp1 = 1
</unit>
<map>
temp0 = ping to ping1_results
temp1 = ping to ping2_results
</map>
<alerts>
</alerts>
rigid = 0, 0, 2
limit = 100, 100, 100
</gensens>
----------------
To: monitorix-general@lists.sourceforge.net (monitorix-
gene...@lists.sourceforge.net);
Cc: Jordi Sanfeliu (jo...@fibranet.cat);
Subject: [Monitorix-general] [SPAM] want to monitor ping with monitorix;
14.08.2025, 12:45, "Jordi Sanfeliu via Monitorix-general" <monitorix-
gene...@lists.sourceforge.net>:
Hello,
If you use only a single script to execute these two commands you must
keep in mind that the second command will be executed 5 seconds later.
That won't scale well if you plan to track more pings. Better use a
crontab line for each command.
I don't know that is 'fcron', I only have 'cronie' in my Fedora.
Regarding the error in the log file, can you, please, paste here the
section <gensens> from your configuration file?
Regards.
On 8/14/25 08:30, wilson rodrigues wrote:
I am using this command as per https://www.monitorix.org/
faq.html <https://www.monitorix.org/faq.html>
<https://www.monitorix.org/faq.html <https://
www.monitorix.org/faq.html>> (Is there an easy way to integrate
a ping statistic?)
|ping -c 5 -nq 8.8.8.8 | tail -1 | awk '{if ( $4 == "" ) { print
"0/0/0/0" } else { print $4}}' | awk -F / '{print $2 }' > /tmp/
ping1_results.txt ping -c 5 -nq 8.8.4.4 | tail -1 | awk '{if
( $4 ==
"" ) { print "0/0/0/0" } else { print $4}}' | awk -F / '{print
$2 }' > /
tmp/ping2_results.txt |
I have created a shell script with above commands. When the
script is
run manually it is working fine. Getting the two graphs in
monitorix.
But when same script is run in fcron only ping2 graph is
displaying
correctly. My crontab entry is
* * * * * root sh /root/bin/monitorix_ping_gensens.sh
Error in /var/log/monitorix is Use of uninitialized value $val in
division (/) at /usr/lib64/monitorix/gensens.pm line 156.
What I have tried: Disabling fcron entry and running script
manually
works fine. With fcron only ping2 graph is working.
Sincerely,
Wilson Rodrigues
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--
Jordi Sanfeliu
FIBRANET Network Services Provider
https://www.fibranet.cat <https://www.fibranet.cat/>
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Sincerely,
Wilson Rodrigues
--
Jordi Sanfeliu
FIBRANET Network Services Provider
https://www.fibranet.cat
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