Permissions safety check in linux?

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http://stackoverflow.com – What is the quickest way to check the permissions of several folders and files in /home to see if any accounts have permissions set to an unsafe value? What would be considered unsafe? files that have access levels that could potentially be written to from the public read access to .htaccess, .svn, etc files any files that may otherwise compromise the safety of the web server EDIT I think this is a two-part question. I've mentioned what I think is unsafe above, but perhaps it should also be asked: what else could make a site unsafe on a permissions level? What are the risk and how do you (HowTos)