Linux Mastery: Master the Linux Command Line in 11.5 Hours

Module 1: Course Introduction & Lab Setup

⏳ 30 minutes

• Overview of course objectives and Linux distributions.

• Set up a virtual machine (VM) or cloud instance for hands-on work.

• Configure SSH access and environment customization (.bashrc, aliases).

Module 2: Filesystem Navigation & Management

⏳ 1 hour

• Use commands like ls, cd, pwd, cp, mv, rm, and ln.

• Understand absolute vs. relative paths, symbolic vs. hard links.

• Employ find and locate to search files efficiently.

Module 3: User, Group & Permission Controls

⏳ 1 hour

• Create and manage users/groups with useradd, groupadd, and usermod.

• Set file and directory permissions using chmod, chown, and chgrp.

• Implement special permissions (setuid, setgid, sticky bit) for security.

Module 4: Software Installation & Package Management

⏳ 1 hour

• Install, update, and remove packages with apt, yum, or dnf.

• Configure repositories and handle dependency resolution.

• Build and install software from source using ./configure, make, make install.

Module 5: Networking Fundamentals & SSH

⏳ 1 hour

• Configure IP addresses, DNS, and routing using ip and nmcli.

• Secure remote access with SSH key authentication and configuration hardening.

• Troubleshoot connectivity with ping, traceroute, and netstat.

Module 6: Shell Scripting & Automation

⏳ 1 hour

• Write Bash scripts with variables, loops, and conditionals.

• Use text-processing tools (grep, awk, sed) for automation.

• Schedule tasks with cron and at.

Module 7: Process & Service Management

⏳ 45 minutes

• Inspect running processes using ps, top, and htop.

• Control processes with kill, pkill, and priority adjustments (nice, renice).

• Manage system services via systemctl and legacy init scripts.

Module 8: System Monitoring & Log Analysis

⏳ 1 hour

• Monitor resource usage with vmstat, iostat, and sar.

• Analyze logs in /var/log using journalctl and log rotation (logrotate).

• Set up basic alerting for critical metrics.

Module 9: Security Essentials

⏳ 45 minutes

• Configure a host-based firewall with ufw or firewalld.

• Secure shared directories and implement SELinux/AppArmor basics.

• Perform vulnerability scanning with Lynis or OpenVAS.

Module 10: Advanced Troubleshooting & Best Practices

⏳ 1 hour

• Diagnose boot issues and recover from single-user mode.

• Use strace and ltrace for low-level debugging.

• Apply configuration management fundamentals (Ansible playbook overview).

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