Red Hat and Novell, its main rival, still make money by giving away Linux and charging for support: customers sign up for a subscription that gives them the right to all the updates and someone to call if something goes wrong.

ECONOMIST: Open-source software in the recession: Born free | The

He also praised bipartisan efforts to draw up an immigration reform bill, adding that if he is sent legislation, "I will sign it right away".

BBC: State of the Union: Obama pledges to reignite economy