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Possible Duplicate:
How do I boot into a root shell?
How would I boot into the Ubuntu and Windows recovery modes if I removed the options to do so from the Grub menu?

My root password has been changed automatically I dont know why!! While trying to reset my root password I just followed the instructio0ns from this link How do I reset a lost password (using recovery mode requires me to type the password)? . But I couldnt enter into recovery mode by pressing SHIF or ESC key.

How to enter into Recovery mode and change my root Password.??

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marked as duplicate by Rinzwind, stephenmyall, hhlp, Ringtail, Takkat Dec 6 '12 at 15:52

This question was marked as an exact duplicate of an existing question.

... but you can also always use a LIVE CD… – Rinzwind Dec 6 '12 at 13:43
@Rinzwind yes But I couldnt enter into Recovery mode. And that is my question here.. – 2vision2 Dec 6 '12 at 14:05
Then you are doing it wrong (just mainly because I doubt your system is anything different than standard). But just in case I am wrong ... 2nd suggestion: use the live CD/installation CD you used will always work. – Rinzwind Dec 6 '12 at 14:07
I know you mention the SHIFT key but make sure you try holding it down as the system boots not just press it, this should get you the grub options. – CoalaWeb Dec 6 '12 at 14:59