cmd line for updating is;sudo apt-get updateshould really be run everytime you want to install anything, it's what synaptic does also.that has got me a few times on fresh installs 8D
I have reinstalled Ubuntu at least 12 times, it's no joke! I keep doing stupid things to f#$% up the sytem. One thing I have noticed is the want of a System > Administration > menu. I have looked everywhere. I just saw a post that said go to "System > Administration > "Synaptic Package Manager"" but of course I couldn't.