Re-configure After Ubuntu Upgrade

Some of my configuration/customization were lost after the upgrade. So, I have to bring them back manually.

Install proprietary video driver

• Press System → Administration → Hardware Drivers.
• Press Activate to enable the driver. You may be asked to enter your password.
• Wait for the proprietary driver to be downloaded and installed.
• Restart your computer to finish enabling the driver.

Change default editor

• ~$ update-alternatives --config editor

Restore configuration files

• /etc/sudoers
•