Today I needed to find all files in a directory tree that had been updated since a specific point in time.
After a few trials this solution worked perfectly.
Create a file “touched” at the date you want to start from.
Then do a “find” that uses this file’s timestamp as a reference.
As simple as:
touch -t 201109130845 start-file.tmp
find messages/ -newer start-file.tmp
Posted by dmom 
