It is actually documented further down in the man page and by the linux- foundation.org that these files can have dots, in fact, multiple dots to accomodate dns domain names.
** Changed in: cron (Ubuntu) Status: Invalid => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/706565 Title: configs with dots in file name not working in /etc/cron.d To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cron/+bug/706565/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs