I'm about 1 week into using my first Ubuntu box. I'm sure that I've accidentally installed (through apt-get) the same packages twice.
Are there any negative consequences to this? It never prompts me, as Windows does, telling me that it's already installed. Does this install a second instance of the software? or does the second installation overwrite the first?
Secondly, what should I do if I install something that I realize I don't want / need. Uninstalling seems like quite the chore on Ubuntu. Is there a good guide for this?