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I have ubuntu 12.04 LTS and I do not know my authentication password due to which i cannot install any software. Its urgent. Please tell me a solution and not a suggestion. In case , if I have set the password and forgotten it, what do I do to remove the existing password?

Sourav Shady Hazarika
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1 Answers1

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"Boot up the machine,and after the BIOS screen, hold down the left Shift key." Did indeed NOT log you into the machine. That is correct. You are seeing a menu instead. If not, then don't read any further and try again.

If you do see the menu: Choose "Advanced options", then choose (recovery) from the menu. Then you see a lot of text passing upward on the screen. Do nothing. Then you see a colored menu. Choose "root".

Type:

mount -o remount,rw /
passwd your_username_here

change your password

then type:

reboot

Source of Screenshots

Pert8S
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