forgot sudo password

[Doodenheimer]

In a terminal, type "passwd" and change your password to something new and write it down.  This is the password for your user account.

Also type "passwd root" and give the root account a different password and write that one down.

When you use `sudo` and are prompted for a password, use your user account password.  If that doesn't work, you'll need to log in as root, or, `su`, and add your username to a group that has permission to use `sudo`.  Consult the manual for sudo, `man sudo`.

Thanks a bunch, but when I type "passed," it asks for the current password. When I type that in, I still get an Authentication failure error.