Have a lot of images/photos which you want to process. Whether it is resizing, shrinking, applying shadow or watermark or tag, phatch is perfect tool for Linux. Phatch which stands for Photo+Batch, is a wonderful tool for Linux to easily batch process your photos.
Phatch is a simple to use cross-platform GUI Photo Batch Processor which handles all popular image formats and can duplicate (sub)folder hierarchies. Phatch can batch resize, rotate, apply perspective, shadows, rounded corners, … and more in minutes instead of hours or days if you do it manually. Phatch allows you to use EXIF and IPTC tags for renaming and data stamping. Phatch also supports a console version to batch photos on webservers.
In order to install the phatch, type the following command on terminal.
[sourcecode lang='bash']sudo apt-get install phatch[/sourcecode]
Phatch Home Page