Change/ Modify Image meta data in Linux

Assume you need to change Image meta data like Date Taken etc. Believe me you may need to change something like this in some cases ;-)
Step 1.) sudo apt-get install libimage-exiftool-perl
Step 2.) exiftool -AllDates='2013:08:08 15:35:33' -overwrite_original image.jpg
Hope this tip would help you in one day :-)