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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.

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Path Info

Level
Clock icon Beginner
Duration
Clock icon 1h 0m
Last updated
Clock icon Aug 05, 2025

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Table of Contents

  1. 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!

  2. 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.

  3. 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.

  4. 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.

  5. 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.

  6. 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.

Shikhar Verma - Labs - Shikhar
Author
Shikhar Verma

Shikhar is a professional system administrator and consultant that has a particular interest in all things related to Linux administration, shell scripting, cloud, Ansible, and automation. He loves making complex technical topics easy to understand. He is an AWS Certified Solutions Architect Associate. He has utilized his IT skills in many Fortune 500 companies. Shikhar has been teaching since 2015 and provides onsite and online training on many IT subjects.

What's a lab?

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