How should I reconcile dot-underscore files after a manual backup? I recently had to (hurriedly) back up data on an older Macbook before migrating it to a new one. Since all I had at my disposal was a large FAT32 formatted drive, I used that and a manual copy. I've since used rsync to put it back on a (non-journaled) HFS+ drive (under Ubuntu).

Now most of the files have a corresponding ._ file alongside them. I understand that this is how OS X stores extended attributes and other information on non-HFS+ filesystems. So my question is: now that I have these files back on a HFS+ filesystem, how can I reconcile the information in the ._ files? That is, since the data in those files can now be stored in the HFS+ metadata for each file, how do I put it back?
dot_clean

dot_clean(1) Mac OS X Manual Page

Apple's description: 


  For each dir, dot_clean recursively merges all ._* files with their
  corresponding native files according to the rules specified with the
  given arguments.  By default, if there is an attribute on the native
  file that is also present in the ._ file, the most recent attribute
  will be used.
  
  If no operands are given, a usage message is output.  If more than one
  directory is given, directories are merged in the order in which they
  are specified.


Proceed with caution. Whilst the man page lists no known bugs, it is possible to lose data through careless use of the command.