I have a problem with my Mac Mini. I dont remember my user password. How can i retreive it?

I have a problem with my Mac Mini. I dont remember my user password. How can i retreive it?

Mac OS X 10.6 Help- If you forget your administrator password
Boot to the Recovery HD:
Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
When the menubar appears select Terminal from the Utilities menu. Enter resetpassword at the prompt and press RETURN. Follow instructions in the dialog window that will appear.
Or see Reset a Mac OS X 10.7 Lion Password and OS X Lion- Apple ID can be used to reset your user account password.

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