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Possible Duplicate:
How to know my root password?
how to back to be the administrator in ubuntu 11.10

i was exploring in the users account. and i have changed my account rom administrator to standart. now it request a master password, and I can't install applications nor delete them. what can i do?

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marked as duplicate by Nitin Venkatesh, Bruno Pereira Feb 21 '12 at 17:34

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

Did you take a look at How to know my root password? – Nitin Venkatesh Feb 21 '12 at 17:32
Alfredo, your other post was closed because it is a duplicate of a question already answered. Please do not create further posts again over the same subject. Read the answers on linked post that is now on your other question and if you need help with some other issue please let us know. – Bruno Pereira Feb 21 '12 at 17:33
ok. but could I reeceive somo help? – Alfredo Feb 21 '12 at 17:58
I want to use this, not the other post. – Alfredo Feb 21 '12 at 18:04

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