File Manager with Built in CLI?

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http://crunchbanglinux.org – Does anyone know of some good file managers that have a terminal built in?  Also, I remember looking online for the way to change default file managers, but remember it being way too difficult for me, and outdated by a few years ... is there a relatively easy way to change the file manager?  My dream is to have something like Krusader with a built in CLI :) (HowTos)