Linux Users and Permissions
A 19-part series covering linux commands and security
Linux access control starts with users, groups, and permissions. This series covers the essential commands and files that control who can log in, what they can do, and which files they can access.
Each article includes clear examples you can run on any Linux system. The series is organized into five modules:
What You Will Learn
- Getting Started - Listing users, creating accounts, and managing passwords
- Groups - Creating groups, assigning users to them, and removing groups
- Privileges - su, sudo, and safe privilege escalation
- Permissions & Ownership - chmod, chown, and permission basics
- System Files & Defaults - /etc/passwd and umask behavior
Prerequisites
- Basic familiarity with the Linux command line
- Access to a Linux system (or WSL on Windows)