Almost 3 weeks that, in my downtime, I try to find out where the files cron.allow & cron.deny are located in debian7 distro. No way, it seems that by default they are not in the system.

'Just' for hardening purposes, I would have those files available in my system. My question is actually if I can just touch them and use them without have to make other configurations.

root@asw-deb:~# touch /etc/cron.allow
root@asw-deb:~# touch /etc/cron.deny

Or if I may have to 'map' those files, maybee editing some cron configuration files, 'saying' where cron can find the two files I created.

Sorry if I sound a little nooby.


From the manual man 1 crontab:

If the /etc/cron.allow file exists, then you must be listed (one user per line)
therein in order to be  allowed to use this  command. If the /etc/cron.allow file
does not exist but the /etc/cron.deny file does exist, then you must not be listed
in the /etc/cron.deny file in order to use this command.

If neither of these files exists, then depending on site-dependent configuration
parameters, only the super user will be allowed to use this command, or all users
will be able to use this command.

If  both  files  exist  then  /etc/cron.allow  takes  precedence.  Which  means that
/etc/cron.deny is not considered and your user must be listed in /etc/cron.allow in
order to be able to use the crontab.

Regardless of the existance of any of these files, the root administrative user is
always allowed to setup a crontab. For standard Debian systems, all users may use
this command.

I gave it try on Debian 7, and it is working exactly this way.

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  • Wops! I have not thought to look in the man!! so silly! thankyou! Great also i don't have to do nothing, because only the root was exaclty what i wanted! – lese May 20 '14 at 15:39
  • I'm not sure that you can add root to cron.deny – confiq Sep 3 '14 at 9:46

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