Cheat sheet for Linux users and permissions |

Cheat sheet for Linux users and permissions

Download our new cheat sheet for managing Linux users and permissions.

Penguins walking on the beach
Image credits : 

Original photo by Rikki Endsley. CC BY-SA 4.0


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The Linux operating system is a true multi-user OS, meaning it assumes that there's data on every computer that should be protected, whether in the interest of privacy, security, or system integrity.

Linux uses file ownership and permissions to manage file and folder access. 

For administrators who deal with different user environments all day, this system is easy to understand, calculate, and control.

For users still learning Linux, or for users who learned Linux primarily in a single-user environment, file access can seem restrictive and confusing.

Our Linux Permissions cheat sheet covers important file and directory access commands to help you understand and manipulate which user and group member can see shared data on your Linux computer.

This cheat sheet is part of a larger set that includes Linux Networking, SELinux, and common Linux Commands.

Next time you find yourself unable to read, write, or execute a file on your system, refer to this cheat sheet to understand why, and to remember how to fix the problem.

Download our Linux users and permissions cheat sheet today!

Hand putting a Linux file folder into a drawer

Linux security permissions designate who can do what with a file or directory.

Knowing how to control users' access to files is a fundamental system administration skill.
Hand putting a Linux file folder into a drawer

Learn how to change a file or directory's ownership with chown.

About the author

Seth Kenlon
Seth Kenlon - Seth Kenlon is a UNIX geek, free culture advocate, independent multimedia artist, and D&D nerd. He has worked in the film and computing industry, often at the same time. He is one of the maintainers of the Slackware-based multimedia production project Slackermedia.