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I tried to upgrade to 12.04 LTS but it got stuck at 36 minutes to complete upgrading. I restarted the computer and cannot boot my previous version of Ubuntu 2.6.32.

It stuck at this message:

since the script you are attempting to invoke has been converted to an Upstart job, you may also use the start (8) utility..
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The message you showed us is no error message. We will need more info, but first: how long did you wait after this message appeared? – guntbert Apr 2 '13 at 14:10
Hi, there were some more messages with [OK] at the end. I waited for about 15 minutes but nothing happened – nana Apr 2 '13 at 15:47

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