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I installed UBUNTU 12.04 LTS today. I had kept my password as "1317kmb".On restarting and updating it asks for password. when i use the above mentioned password, it does not accepts. I don't know why? How can I reset password. All my enthusiasm of using UBUNTU has been lost by this.

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marked as duplicate by Javier Rivera, Eric Carvalho, Radu Rădeanu, Mitch, Seth Jun 10 '13 at 15:36

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.

    
You do have an m in your password. Can you try 1317k;b just to check it is not the difference between qwerty and azerty? –  don.joey Jun 10 '13 at 9:43
    
If the above question doesn't help you, please try also this one: askubuntu.com/questions/121698/… –  Javier Rivera Jun 10 '13 at 9:44
    
If this is a keyboards issues, check the active keyboard on the login screen. –  don.joey Jun 10 '13 at 9:45

2 Answers 2

You may try typing the password on the user name field to make sure that you are actually entering the correct password.

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Open a Terminal window or access the prompt from your grub menu (see https://help.ubuntu.com/community/LostPassword) and type in

sudo passwd

Enter your password at the prompt and follow the on-screen instructions

Please Note When you enter your password and confirm it, nothing is displayed on the screen... It's not your keyboard!

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How can the OP open a terminal if he cannot login? –  don.joey Jun 10 '13 at 10:07
    
@Private At the grub menu, go to advanced settings then drop back to root. See help.ubuntu.com/community/LostPassword –  SimplySimon Jun 10 '13 at 10:18

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