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I was trying to download GIMP on my computer,it asked for a autheticate password! of course I didn't know it,so I wasn't going to try to type it in if it was only going to say it was wrong What should I do?

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marked as duplicate by Jorge Castro, Radu Rădeanu, gertvdijk, Seth, Mitch Aug 19 '13 at 21:26

This question was marked as an exact duplicate of an existing question.… – fi40 Aug 19 '13 at 19:58

Reboot your system and select Advanced options from Grub. Then select Ubuntu (recovery mode) and change password for existing user:

  1. Run

    passwd user_name

    Replace user_name with your actual username.

  2. Type password when prompt:

    Enter new UNIX password:
  3. Retype password (it will ask so).

  4. Reboot and use your new password.
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