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If I place a shell script in /etc/cron.daily/, at what time of the day will it be executed?

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up vote 29 down vote accepted

Looking at /etc/crontab it should run at 06:25.

17 *    * * *   root    cd / && run-parts --report /etc/cron.hourly
25 6    * * *   root    test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.daily )
47 6    * * 7   root    test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.weekly )
52 6    1 * *   root    test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.monthly )
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This is most probably wrong because anacron is installed by default. The other answer is the correct one. – user1455622 May 22 '14 at 7:53
Yes, this aswer is generally misleading. If anacron is installed see @DaithiF's answer. – hamdiakoguz Oct 17 '15 at 13:40

Approximately 7:35am, but the exact timing will depend on anacron.

By default cron delegates the running of /etc/cron.daily jobs to anacron. /etc/crontab contains the line:

25 6    * * *   root    test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.daily )

but this defines the behaviour if anacron is not installed

With anacron installed, the running of cron.daily jobs is controlled by the entry in /etc/anacrontab:

1   5   cron.daily   nice run-parts --report /etc/cron.daily

which says run these jobs once per day, with a delay of 5 minutes.

anacron itself is run by cron, as specified in the file /etc/cron.d/anacron, which runs anacron at 7:30am.

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As indicated by other answers, the result depends on whether anacron is installed. On a desktop, it is installed by default, BUT crucially it is not installed in the server distribution. So the answer is around 06:25 on a server and about 07:35 on a desktop.

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