Managing Linux Users Lab

Activity Overview

This lab focused on user management in Linux. I learned the difference between authorization and authentication, and how to control system access for users through the command line. I used commands like useradd, usermod, userdel, and chown to manage users and their permissions. These actions are essential to ensuring that only appropriate individuals can access or modify sensitive system resources.

Scenario

A new employee, researcher9, joined the organization. My task was to:

1. Add the user researcher9 to the system.
2. Assign the user to their secondary group.
3. Use chown to modify file ownership.
4. Delete the user from the system after completion.

I executed each of these steps using administrative privileges via sudo to simulate real-world user management tasks.

What I Learned

• How to add new users with sudo useradd researcher9
• How to modify file owndership using sudo chown researcher9 /home/researcher2/projects/project_r.txt
• How to Add the user to a secondary group sudo usermod -a -G sales_team researcher9
• How to delete a user with sudo userdel researcher9
• The importance of restricting access only to those with a legitimate need

This lab provided hands-on experience in essential administrative tasks that every security analyst should be comfortable performing in a Linux environment.

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