You could boot off the install disk and go into its recovery mode, electing to mount the file system under /mnt when prompted (at least, it should I believe). After the file system mount is complete, you should be given a choice to drop down to a command prompt and exist as the root user.
Find the line (should be at the top) that beings with your user name. Edit the file containing that user's password and delete the LotsOfSeeminglyRandomJunk between the first ":" and the second ":" characters from the left. Use vim (/usr/bin/vim) to open the file.
vim /etc/shadow
It will look something like this: user:LotsOfSeeminglyRandomJunk:13924:0:99999:7:::
After editing the line, it should look like this: user::13924:0:99999:7:::
Save and quit by hitting your Esc key then typing what follows before hitting your Enter key :wq!
Reboot, removing the install disk. Log in as your user with a blank password. then reset the password like this:
sudo passwd user [press enter]
[enter password]
[enter password again]
Done.
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since Dec 2006
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