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New to cron on debian 9 , I have a file called ipupdate in /etc/cron.hourly/ipupdate

-rwxr-xr-x 1 root root 132 Jul 11 18:21 ipupdate

the file has a single curl command like this:

curl "https://..."

if I run the script manually it runs just fine

in my logs I see:

Jul 17 14:17:02 dpi CRON[12248]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly)

the script is not being executed (my ip is not updated), why ? how can I troubleshoot please ?

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There are different possible reasons.

A common problem is that the environment is not what the script expects. In particular, it might be that some programs are not in $PATH, although curl is probably part of your distribution and therefor in the standard PATH.

You should add a line #!/bin/sh at the top of the file.

In the script, you can add the line

exec >> /tmp/log 2>&1

Then if the file is not created, the script is not executed. If the file is created, check for clues why is doesn't work.

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