Linux+ Troubleshooting: Troubleshoot User Access
In this lab, and will gain practical experience configuring quotas on the Linux file system, you will see how to install software for using quotas. You will also learn how to set up quota limits for users. Additionally, you will diagnose and troubleshoot login issues. Finally, you will enhance the security of user passwords on Ubuntu systems by implementing a password complexity policy.
Terms and conditions apply.
Challenge
Get Started in the Lab Environment
Here are the initial instructions and explanation of the lab environment. Read this while your environment is busy creating itself from nothing. Yes, this violates physics; we know. How fun!
Challenge
Learn About Quota Installation and Add Kernel Modules
To start this lab, you will learn how to install quota tools and the quota kernel module, you will confirm the installation, and add two modules.
Challenge
Set Quota Limits for Users
You will first activate the quota on the root filesystem and remount it with quota-related options. Then, you will create a quota limit for the user named ubuntu with a soft limit of 50M and a hard limit of 55M.
Challenge
Determine a User Quota
In this challenge, you will verify the user quota for the ubuntu user. Then, you will attempt to create a file that exceeds the quota.
Challenge
Diagnose Login Issues
Your goal is to diagnose a login issue for user u1. Begin by trying to log in with user u1, and then troubleshoot to identify the potential cause of the problem.
Challenge
Implement a Password Complexity Policy
To finish this lab, you will enhance the security of user passwords by implementing a password complexity policy. The policy should require passwords to have a minimum length of eight characters, and include a combination of uppercase letters, lowercase letters, numeric characters, and special characters.
Provided environment for hands-on practice
We will provide the credentials and environment necessary for you to practice right within your browser.
Guided walkthrough
Follow along with the author’s guided walkthrough and build something new in your provided environment!
Did you know?
On average, you retain 75% more of your learning if you get time for practice.
Recommended prerequisites
- Basic Linux commands knowledge.
- Knowledge of how to use vim or nano is useful
- Familiarity with concepts in the video course CompTIA Linux+: Troubleshooting