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My machine is booting. What kind of diagnosis program can I run on my Ubuntu Server to have a clue what is broken?

Thanks very much!

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closed as not a real question by MDMarra, Iain, mailq, Ward, voretaq7 Jul 28 '12 at 4:11

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.

The type of failure almost always indicates which test you should be running. Just randomly running tests usually won't be very useful. Have you considered looking at the diagnostic software provided by your hardware manufacturer? – Zoredache Jul 13 '11 at 7:44
up vote 2 down vote accepted

Memtest86+ - RAM testing.

cpuburn & lmsensors - CPU testing with heavy load.

smartmontools - hard disk SMART testing and monitoring.

Hardware diagnostics with open source tools

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If you're really desperate to find out what's broken, I'd throw an all-in-one burn-in tool like Breakin or Stress Linux and see what floats up.

However, I wouldn't bother doing that. Hardware is cheap enough, and your time (and the time of your users) is valuable enough (I hope, anyway) that it's cheaper and quicker just to ship 'em a new box and be done with it. Have the old one shipped back for testing if you're feeling curious, but don't bother trying to fix the problem while users are getting no work done.

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