C H A P T E R 21
Understanding Linux Users and File Permissions
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.
So, whether you're aware of it or not, you always have a user account inside Ubuntu. Your user account will have a defined set of attributes that will distinguish it from other user accounts: ...