Again, those one line post are not helpful. How do you want to install nitdroid, if your package management is in a twisted non-functional state.

Please provide the output of the commands to look at it. Helpful people will chip in to get things sorted somehow.

Here is how Copy'n'Paste works best for you:
If you run a command in X-Terminal application, an arrow symbol is displayed in the lower left corner, click it to activate the output of the command and the command itself, select 'Copy' from the status bar to paste the activated parts to the internal 'clipboard', select the browser to go to this very topic and select from the browser status bar menu 'Paste' to get the clipboard's content to your next post in the thread