Ubuntu Sudo Password Fix
After creating a few Ubuntu Virtual Machines from a VMware image, I was having some issues with the sudo command. It was requiring that I enter my password twice before authenticating me. This would also happen when I logged into the console gdm.
Here is the quick fix:
1. sudo -i (yes type in your password twice for this one)
2. vi /etc/pam.d/common-auth
3. find the line "auth required pam_unix.so nullok_secure" and append "try_first_pass" so that you have "auth required pam_unix.so nullok_secure try_first_pass"
4. Save the file and you should no longer have the double password sudo issue.