Regarding question one: Effectively you are trying to make root "double root" by applying sudo in a root terminal. There for you get that error message. When in a root terminal, don't use sudo but simply the command. Note that the nice thing about sudo is that it executes just the one given command as root, after which the terminal is back to it's normal user state.

The second question I can not answer as I don't use h-e-n.