I am studying linux on my raspberry pi that installed debian version.

There were no problem, worked perfectly in crontab, but something has occured.

 @reboot sudo bash /home/pi/IP_check.sh
 */10 9-24 * * * sudo bash /home/pi/IP_check.sh

Shell script has no problem, but don't work at every 10 mins. There is not any log in /var/log/syslog. It seems perfectly ignored. But @reboot is working, also the filelog exists in /var/log/syslog, but just for the reboot. I surely checked permission to execute (r-x), tried re-install the crontab but it doesn't fixed anything.

What can I try something for solve this problem?


That crontab entry is invalid, maximum value for hours is 23, not 24. Hence that line is rejected. You should have gotten an error after adding it.

  • Oh my god! I was wrong the common sense! Thank you! – spending Dec 10 '14 at 11:57

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