Ubuntu, like other Linux distributions, restricts access to files and system settings by default. Each user account has read and write access to its own files and read access to some system files.

Linux is a multi-user environment, which means more than one user can use the system at one time. Granted, that mostly takes the form of console access (via SSH), because you can't easily have two ...

Linux provides a useful array of commands for managing file permissions, getting information on commands, displaying running processes and displaying details on the system itself. The uname command ...