Q:

Fully keyboard driven file manager for Linux

I'm looking for a Linux file manager:

Graphical. 
Desktop environment neutral, plain GTK or Qt libs
are OK, I just don't want to install million services from GNOME or
KDE just to use a single app. 
Has keyboard shortcuts that do not
include the use of arrow keys as I don't want to move my fingers
from touch typing position. For example Midnight Commander has Ctrl+n, Ctrl+p, Alt+n
and Alt+p for moving in the file lists which is great.  
Has thumbnails so that I can preview images. 
Preferrably twin panel.

Double Commander has all of this except the keyboard navigation. Midnight Commander has everyting except the thumbnails and is not graphical. All the ones I've tried fail in some way (GNOME Commander, emelFM, SpaceFM, 4Pane, gentoo, Tux Commander). 

A:

XFE is your next file manager.

It is graphical, in the same way DC is at least.
It aims at being light, and only requires the FOX library.
It has configurable key bindings, so you can express your hate of arrow-keys
It has thumbnails so you can preview image
Like any cool file manager, it is twin panel (it descends from X Win Commander, which makes it a distant cousin of Midnight Commander).

