Chapter 17: Bonus Content

Chapter 17: Bonus Content and Practice Labs

Comprehensive Practice Labs

Complete these labs to consolidate all skills from Chapters 1-16.

Lab A: Full Server Setup

1. Install Ubuntu Server 24.04
2. Create admin user, disable root SSH
3. Configure UFW: allow 22, 80, 443
4. Install nginx, configure virtual host
5. Set up automated daily backups with rsync
6. Configure log rotation
7. Set up fail2ban

Lab B: Troubleshooting Scenarios

1. Service fails to start - diagnose from journalctl
2. Disk full - find and clean large files
3. SSH locked out - recover access
4. High CPU - identify and handle runaway process
5. Permission denied - fix file ownership

Certification Study Guide

CompTIA Linux+: focus Chapters 1-12
LPIC-1 (101+102): covers Chapters 1-12
LPIC-2: extends to Chapters 13-17
RHCSA: focus Chapters 5,7,8,9,10,12,14

Quick Reference Card

Files:      ls cd pwd mkdir cp mv rm find
Perms:      chmod chown chgrp
Users:      useradd usermod userdel sudo
Packages:   apt/dnf install remove update
Processes:  ps top kill crontab
Storage:    df du mount fdisk mkfs
Network:    ip ss ping ssh rsync
Services:   systemctl journalctl
Security:   ufw fail2ban ssh-keygen