Summary  
This chapter explains the Linux file permission model by defining three user roles—owner, group, and others—and how to assign read, write, and execute access rights to control file and folder security.  

General domain of usage  
System administration

In **Windows or MacOS**, when you create a file or folder, you can set permissions only for **yourself** or for **all users** on your computer. In **Linux**, there's a bit more control. When you create a file or folder, you can set permissions for three groups of people:

- **Owner**: that's **you**, the one who created the file or folder. You can decide what can and cannot be done with this file or folder, like who can read, write, or delete it;

- **Group**: you can also create a special **group of people** who have access to this file or folder. These could be your **friends or colleagues**. You can set permissions for this group separately from the ones you set for yourself;

- **Others**: these are **all the other people** who use this computer but aren't the owners or part of the group. You can also set permissions for them, determining what they can or cannot do with your file or folder.

This allows you to **control who has access** to your file or folder and **what actions** they can perform. It's an important **security aspect** in Linux that helps protect your data from unwanted changes.


Up to this point, you’ve been performing all actions as **root user**.  The **root user** in Linux has the **highest access rights** and **full control** over the system. They can perform any **system-level operations**.  You’ll learn how to create and manage **new users**, **user groups**, and their **access rights**.

Study More

Who is considered the owner of a file or folder in Linux?

What are the three groups of people you can set permissions for when creating a file or folder in Linux?

Het leren van Linux is waardevol voor veel IT-beroepen. Voor systeembeheerders, DevOps-engineers en backend-ontwikkelaars maakt het efficiënt serverbeheer, automatisering van softwareontwikkeling en -implementatie, en de ontwikkeling en het beheer van server-side applicaties mogelijk. Voor netwerkbeheerders, cybersecurity-professionals en data-analisten helpt kennis van Linux bij het effectief beheren van netwerken, waarborgen van beveiliging en analyseren van data.

Leer wat Linux is, ontdek de belangrijkste voordelen en begrijp waarom het een voorkeurskeuze is onder ontwikkelaars. Kies een Linux-distributie om gedurende de cursus mee te werken.

Een virtuele omgeving opzetten en Linux op uw computer installeren om veilig commando's te oefenen zonder uw hoofd­systeem te beïnvloeden.

Verkrijg essentiële Linux-vaardigheden zoals het gebruik van de terminal, navigeren door bestanden, programma's installeren en het systeem up-to-date houden.

Ontdek hoe gebruikers en groepen beheerd worden, bestandsrechten geconfigureerd worden en toegangsrechten binnen de Linux-omgeving gecontroleerd worden.

Understanding User Roles Concepts

1. Who is considered the owner of a file or folder in Linux?

2. What are the three groups of people you can set permissions for when creating a file or folder in Linux?