Users, Groups, and Permissions
July 1, 2026 · View on GitHub
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Master Linux user and group management, file ownership, and permissions. Learn how to control access to files and directories using symbolic and octal modes, understand sudo privileges, and configure default permissions with umask.
Exercises
| Index | Name | Difficulty | Practice |
|---|---|---|---|
| 1 | Users and Groups Explained | Beginner | Start Lab |
| 2 | File Ownership and Group Ownership | Beginner | Start Lab |
| 3 | Reading Permission Bits | Beginner | Start Lab |
| 4 | Changing Permissions with Symbolic and Octal Modes | Beginner | Start Lab |
| 5 | Using sudo and Root Privileges | Beginner | Start Lab |
| 6 | Default Permissions with umask | Beginner | Start Lab |
| 7 | Secure Team Workspace | Beginner | Start Challenge |
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