I recommend GreenAddress to you.
isn't multibit for linux also? there you go
Yes.
Yes, but I am going to recommend Electrum it runs real light and smooth and literally takes seconds to be up and running, whereas I have seen Multibit still takes some time to sync.
Multibit uses Java whereas Electrum uses Python which makes Multibit a bit slow in low CPUs. Have you tested Multibit HD? Its in Beta phase but it is better.
here I can download electrum in the package manager.
Armory too, but you will need the qt installed too
Me too. Synaptic package manner is a good one for instaling directly.
You can use CounterWallet with Armory offline which doesn't need Bitcoin-Qt.
-MZ