gphoto2 is a command line application which enables you to transfer digital photos from almost any serial-port or USB digital camera. It uses the programming interface provided by libgphoto

gPhoto is a program and library framework that lets users download pictures from their digital cameras. The libgphoto2 library gives you access to hundreds of models of digital cameras on several platforms.

Photo is a free software package of digital camera applications with support for more than http://www.gphoto.org/proj/libgphoto2/support.php 800 cameras. It is available under the GNU General Public License. gPhoto runs on GNU/Linux, Free BSD, Net BSD and other Unix-like operating systems.