I have forgotten my administrator password and can't find my Mac OS X Install Dvd..what can I do?

I have forgotten my administrator password and can't find my Mac OS X Install Dvd to reset it, what can I do?

OK, try this:
http://osxdaily.com/2010/08/10/forgot-mac-password-how-to-reset-mac-password/
Be very very careful if you decide to use Terminal. Even a small typing error can cause a disaster. And terminal commands must be typed exactly as shown, including spaces.
Good luck.
p.s. Your Apple ID and password - different from the computer log in password - are what you used to get to this discussion.

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