How to configure Debian to create new added users through adduser to be secure by default / Limiting access to other user’s information
If you’re about to add new users to your Debian GNU/Linux you should have certainly noticed that the defaultusers created in /home directory are created with a 755 chmod permissions. More here
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Good tip. I don’t recall /root being set to 755 by default however…
I’d worry more that /root/ is world readable by default: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=295858