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Linux follows five core principles:

1. Everything is a file - All configuration files for the various services running on the Linux operating system are stored in one or more text files.
2. Small, single-purpose programs - Linux offers many different tools that we will work with, which can be combined to work together.
3. Ability to chain programs together to perform complex tasks - The integration and combination of different tools enable us to carry out many large and complex tasks, such as processing or filtering specific data results.
4. Avoid captive user interfaces - Linux is designed to work mainly with the shell (or terminal), which gives the user greater control over the operating system.
5. Configuration data stored in a text file - An example of such a file is the /etc/passwd file, which stores all users registered on the system.