Now I am having a complete cycle on Linux for my photographs :)
Shoot, store in the folder by year/month/shootname style, then see the photos in gthumb or any other viewer and open in Gimp, do the post process and save it in another folder as jpeg. I only shoot in RAW format which is .nef files for my case (I am having a Nikon D80).
Only thing I was missing, was a solution for HDR photographs. And that problem is also solved now by some great guys with a work called Qtpfsgui. Some sample outputs are given below :)