How to make money from Open Source Software?

A question that often arises as an objection to Open Source software is: How can I make money from software if I am giving it away for free?Let us start by a few news items first.Techworld reports that the German National Railway has successfully migrated 55,000 users to Linux. The roll out was overseen by IBM.Reuters reports that in Extremadura, Spain, 14,000 medical professionals will be given access to a system that is based on Open Source software. This is also an IBM contract for 33$ million.I guess this at least partially answers the question recently asked on Slashdot: How to Make Money from Open Source? Here are some articles from a comment in the above discussion:

You can find more on Google by using the search terms Make Money using Open Source.