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Run ping command every hour in backgrond

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# 1  
Old 05-12-2017
Run ping command every hour in backgrond
Hi,
I have a VPN tunnel. It is going down occasionally. I need to run "/usr/sbin/ping 172.xx.xx.xx.xx" and it give mes output "172.xx.xx.xx is alive" and immediately after that VPN tunnel comes up.
Till we find permanent solution, I want this command to run in background, like every one hour. Should I simply have below entry in cronjob ?
Code:
0 * * * * /usr/sbin/ping 172.xx.xx.xx.xx

Or any other way ?
# 2  
Old 05-12-2017
I don't see an immediate problem except the strange IP format. What's the result if you install that crontab entry?
# 3  
Old 05-12-2017
It is not executing via crontab. I am root. ( I am giving actual IP, not xx.xx.). Just for testing purpose, I made it every minute
Code:
bash-3.2# crontab -l | grep -i ping
* * * * * /usr/sbin/ping 172.23.xx.xx > /tmp/ping_test
bash-3.2# cat /tmp/ping_test
cat: cannot open /tmp/ping_test
bash-3.2#

If I run command manually, I can see output in /tmp/ping_test
# 4  
Old 05-12-2017
Can't tell why it behaves as described. Is the path correct?
If I reproduce your setup, cron creates an (endlessly) pinging process every minute. You might want to limit the ping count so it stops after a few pings.
/tmp/ping_test is catable all the time. That error message I can't reproduce; all I get is cat: /tmp/pt: No such file or directory in case.
# 5  
Old 05-12-2017
Yes, path is correct. If I run it manually, it works
Code:
bash-3.2# crontab -l | grep -i ping
* * * * * /usr/sbin/ping 172.23.xx.xx > /tmp/ping_test
bash-3.2# which ping
/usr/sbin/ping
bash-3.2# cat /tmp/ping_test
bash-3.2# /usr/sbin/ping 172.23.xx.xx > /tmp/ping_test
bash-3.2# cat /tmp/ping_test
172.23.xx.xx is alive
bash-3.2#

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