The default account type for any account created after installation is “Desktop user.” To view the other account types, click on the Change button as shown below.
This image shows the three account types available.
To view the privileges assigned to the account, click on the Advanced Settings button on the main Users and Groups window. If you make any changes to the default privileges, the account type will be changed from “Desktop user” to “Custom.”
If for any reason you no longer wish to keep the account, the Users and Groups tool gives you two options: Delete or disable it. Disabling the account will render the password unusable. The system accomplishes that by appending a “!” in front of the hashed password in the shadow file.
If an account is disabled (in the Advanced Settings window), the status will be reflected in the main Users and Groups window.
If you opt to delete the account, you will have the option to either delete the home directory associated with the account, or keep them.
That is all there is to using the Guest Session and creating a guest account in Ubuntu (10.10).