Why does cron.hourly not care about the existence of anacron?

Posted by Oliver Salzburg on Ask Ubuntu See other posts from Ask Ubuntu or by Oliver Salzburg
Published on 2012-06-11T16:41:19Z Indexed on 2012/06/11 16:48 UTC
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This question came up over in Root Access.

Why does the default /etc/crontab not check for existence (and executable flag) of /usr/sbin/anacron for the hourly entry?

My /etc/crontab:

# m h dom mon dow user  command
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 )

What makes hourly different from the others?

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