Understanding Linux Users and File Permissions
Emilio Raggi, Keir Thomas, Trevor Parsons, Andy Channelle, Sander van Vugt · Apress eBooks · 2010
Most modern operating systems work with user accounts to grant people access to the system, and Ubuntu is no exception. You might not have noticed this—if during installation or when you personalized your system you selected the option to allow automatic logins, you are taken directly to your desktop when you boot your PC, thus masking the fact that a user is actually logging into the system. These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.