Jpgtn is a CLI program designed for creating automatic thumbnails from JPEG images. It's free and open source, and it's compatible with any *nix system that has libjpeg. It can process large images to create smaller copies.
One of the main benefits of jpgtn is its compatibility with just about any *nix system that has libjpeg installed. You won't have to worry about compatibility issues or learning a new system just to utilize this software.
Overall, if you need to generate thumbnails from your JPEG images, jpgtn is an excellent choice that won't let you down. Give it a try and see for yourself how easy and effective it can be.
Version 2.06: N/A