Introduction

General Information about Linux

General Information

• The name "Linux" is actually an umbrella term for multiple OS's that are based on UNIX (another operating system).

• a large selling point of using OSs such as Ubuntu is how lightweight they can be.

• Some of Linux systems don't have a graphical user interface (GUI). A large part of interacting with these systems is using the "Terminal".

• A majority of commands allow for arguments to be provided. These arguments are identified by a hyphen and a certain keyword known as flags or switches.

• --help option can be used to get information about the flags/switches of a specific command.

• System commands and most application commands have what's called a manual page. Which can be used to learn more about the command. (Can be accessed using man command)

• Permissions can be so granular in Linux, that whilst a user technically owns a file, if the permissions have been set, then a group of users can also have either the same or a different set of permissions to the exact same file without affecting the file owner itself.