photo_stuff

digikam is good for typical stuff
gimp is good for editing
exiv2 is good for metadata manipulation

set a time
Image timestamp : 2002:10:29 11:53:37
Image timestamp : 2002:10:28 11:16:20

exiv2 -a -36:00:00 arthur001.jpg


# adjst time in file and set file modification time to that time
exiv2 -T -a +00:19:00 P*.JPG

# adjust file modification time to match the date of the file
exiv2 -T P*.JPG