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touch -t 201208211200 first ; touch -t 201208220100 last ;
creates 2 files: first & last, with timestamps that the find command should look between:
201208211200 = 2012-08-21 12:00
201208220100 = 2012-08-22 01:00
then we run find command with "-newer" switch, that finds by comparing timestamp against a reference file:
find /path/to/files/ -newer first ! -newer last
meaning: find any files in /path/to/files that are newer than file "first" and not newer than file "last"
pipe the output of this find command through xargs to a move command:
| xargs -ifile mv -fv file /path/to/destination/
and finally, remove the reference files we created for this operation:
rm first; rm last;
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