Photivo is a free and open source (GPL3) photo processor. It handles your RAW files as well as your bitmap files (TIFF, JPEG, BMP, PNG and many more) in a non-destructive 16 bit processing pipe with gimp workflow integration and batch mode.
Linux build instructions The instructions to build Photivo under Linux can be …
The KDE desktop environment supports environment variables. These are active when logged in to KDE. Contrary to regular bash environment variables, which are active only when a bash shell is started.