Hello folks,
thanks for the answers.
My machine is always up. For my tests, I created cron jobs one minute after the current time and the job was executed every time according to /var/log/cron.
I have modified the first echo so it now looks like this: /bin/echo "START" > /root/backups.log
However, after the job was ran (according to /var/log/cron), the /root/backups.log does not contain that entry. It really looks like the script was not executed at all.
I really don't understand what's happening