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Removes the given string from all files under the given path - in this case the path given is "." This demonstrates the characters that must be escaped for the grep and sed commands to do their work correctly. Very handy for fixing hacked html files.
This will search for "string" in all files under the given path "." and provide a listing of the files with their relative locations.
This will find all files under the path "." which are older than 10 days, and delete them. If you wish to use the "rm" command instead, replace "-delete" with "-exec rm [options] {} \;"
This will find all files in the path "." which are older than 10*24hrs (10 days). This will find any type of file.