Hello Linux Geeksters. As you may know, Darktable is an open source photography workflow application and RAW developer. It allows the users to manage their digital negatives in a database, enabling him to develop raw images.
The latest version available is Darktable 1.2.2. For instructions on how to install it on Ubuntu 13.04 Raring Ringtail, Ubuntu 12.10 Quantal Quetzal, Ubuntu 12.04 Precise Pangolin, Linux Mint 15 Olivia, Linux Mint 14 Nadia, Linux Mint 13 Maya, see this article.
An explanatory video has been created by a profesional photographer, offering 19 minutes of instructios on how to do the basics in Darktable. The video has both voice instructions and real time presentation of the features and functionalities of the app, in order to make things easier, for the users.
Anyways, you may try hackr for some reviews. Their design community is quite active. https://hackr.io/tutorials/learn-darktable