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How do I get this script to run periodically via cron?

rated 0 times [ 2] [ 0] / answers: 1 / hits: 4585 / 3 Years ago, sun, august 8, 2021, 12:52:25

I made a script that sends my local sensors temperature to a server in the internet and then I can see a graph of it. Everything works fine when I execute it manully. I have the latest ubuntu version.
When it comes to run periodically every minute with crontab then nothing works. It doesnt send anything. I tried to run it as SUDO and as user, I tried to add it in the crontab file to run it from several locations like /bin/myscript.sh , /user/Desktop and many others...Nothing seems to work.
Any Idea how to solve it?
Thank you!

   echo Init ... 

   TEMP=`/usr/bin/snmpwalk  -v 1 -c public 192.168.1.2 iso.3.6.1.4.1.38783.3.9.0 |  cut -d" " -f4` 

   echo $TEMP





   REALTEMP=`echo  "scale=1; $TEMP/10"  | bc -l`

   echo $REALTEMP 



   echo 

   wget "http://api.thingspeak.com/update?key=MYKEY=$REALTEMP"

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1 Year ago

answered 3 Years ago motivengry · Accepted Answer

I had a similar issue getting cron to recognize a command on a server of mine. The tip that solved my issue came from the troubleshooting section of the Ubuntu Cron Howto:

When adding a new entry to a blank crontab, forgetting to add a
newline at the end is a common source for the job not running. If the
last line in the crontab does not end with a newline, no errors will
be reported at edit or runtime, but that line will never run. See man
crontab for more information. This has already been suggested as a
bug.