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my computer goes on standby every 5mins and will then request for an authentication password; i cant remember setting any password. so i will have to restart the computer again before i can use it. similar problem occurs when ever i want to upgrade or download a software; it keeps asking for authentication password and would not allow me to make any updates. i never set up any authentication password

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marked as duplicate by Eliah Kagan, Jorge Castro, hhlp, Javier Rivera, con-f-use Feb 17 '13 at 14:53

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

When you installed Ubuntu, it usually asks for a User name and a password, a fairly strong password without which it does not proceed ahead with the installation. The system is asking for this password. If you don't remember what the password was, follow the steps given in the answers of this question. There are multiple versions, follow the one applicable to you.

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