I receive the message: “<username> is not in the sudoers file. This incident will be reported.”. How do I enable sudo?

The sudo command allows users to perform tasks as another user - most commonly, the root user. Using sudo instead of su - has significant advantages. Most notably is that all operations performed with sudo are logged to: /var/log/secure.

To use the sudo command, the user (in this article, the user is ned) must be added to the: /etc/sudoers configuration file.
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How do I change the name of an existing user account in Linux?

1. From the desktop, press Alt+F2 to launch the Run Application window.
2. Type:gnome-terminalthen press Enter. This will launch a user terminal (similar to Windows command prompt).
3. At the terminal prompt, type:suthen press Enter. When prompted, type the root (administrator) password then press: Enter. You now have a root terminal session.
4. At the root terminal, type:usermod -l new old where new is the new username and old is the old / existing username then press: Enter. The username is now changed.