So I’ve used quite a few different flavors of *nix but one of my favorite lightweight versions is Xubuntu: That is Ubuntu with XFCE desktop environment. One thing I’ve noticed that is different in this variation is the absence of a “Open as Root” context menu in the file manager (Thunar). Here is how you get around this gap.
sudo apt-get install gksu
You will then see a warning like this one: