Introduction

Linux file permissions and ownership differ from Windows access controls, which can be confusing for newcomers. But it is important to understand who owns a file and who can access it. Learning how permissions and ownership work is an not only an important part of transitioning from Windows to Linux, but can make the whole experience much less frustrating.

In Linux, each file and directory has an owner, and permissions determine who can access or change it. These rules may seem confusing at first, especially when an action is blocked because you do not have permission.

You may also hear the phrase “everything is a file” used to describe Linux. It is a shorthand for the way many system resources are accessed through file-like interfaces, as well as ordinary documents and folders. Because files are such a central part of the system, understanding ownership and permissions is useful well beyond managing personal documents.

This article introduces the basics of Linux file ownership and permissions, helping you make sense of how access works and feel more confident as you get familiar with Linux.