Linux - Command Line Bootcamp by CertifiKation.

1. Introduction to Linux & Open Source

• What is Linux and why it's popular
• History and distributions (Ubuntu, CentOS, Fedora, etc.)
• Linux vs Windows/macOS
• Open Source philosophy and the GNU project

2. Installing Linux

• Creating bootable USBs
• Installing Linux on VirtualBox / VMware / Bare Metal
• Dual boot basics
• Understanding live sessions vs installed systems

3. Basic Linux Commands & File System Navigation

• Linux command line vs GUI
• pwd, cd, ls, man, echo, etc.
• Understanding root (/), home, and bin directories
• Using tab for auto-complete and history for tracking

4. File & Directory Management

• cp, mv, rm, mkdir, rmdir
• Viewing files: cat, more, less, head, tail
• File search with find, locate, which, whereis
• Wildcards and patterns

5. User & Group Management

• Creating and deleting users and groups
• useradd, usermod, groupadd, passwd
• Switching users (su, sudo)
• Understanding /etc/passwd, /etc/shadow, and /etc/group

6. File Permissions & Ownership

• Read, write, execute permissions (rwx)
• chmod, chown, chgrp
• Understanding symbolic and numeric modes
• The role of root and permission hierarchies

7. Working with Text Editors

• Editing with nano, vi, and vim
• Saving, quitting, and editing files
• Search and replace in editors
• Best practices for editing config files

8. Package Management

• Package types (.deb, .rpm)
• APT: apt-get, apt, dpkg
• YUM/DNF: yum, dnf, rpm
• Installing, updating, and removing packages

9. Process Management

• Viewing running processes: ps, top, htop
• Killing and managing processes: kill, killall, nice
• Foreground & background jobs: bg, fg, jobs, &

10. Disk Management & File Systems

• Mounting/unmounting drives
• File system types (ext4, xfs, etc.)
• Commands: df, du, mount, umount, lsblk, blkid
• Disk partitioning basics with fdisk / parted

11. Shell Scripting Basics

• What is a shell script?
• Writing your first .sh script
• Using variables, loops, and conditionals
• Running scripts using bash, making scripts executable

12. Cron Jobs & Scheduling

• Understanding cron and crontab
• Writing cron expressions
• Automating backups, log cleanups, etc.
• Using at and anacron

13. Networking in Linux

• IP configuration: ip, ifconfig
• Checking connectivity: ping, netstat, traceroute, nslookup
• SSH basics and configuration
• Assigning static IP addresses

14. System Logs & Monitoring

• Location of logs: /var/log
• Viewing logs: tail, less, grep
• Monitoring tools: uptime, vmstat, iostat
• Using journalctl for systemd-based logs

15. Managing Services & Systemd

• Introduction to systemctl
• Starting, stopping, enabling, disabling services
• Checking service status
• Creating your own service unit files

16. Firewall & Security Basics

• Introduction to UFW (Uncomplicated Firewall)
• Allowing and blocking ports/services
• Basic iptables commands (intro level)
• Importance of SSH hardening

17. Remote Access & File Transfer

• Using SSH securely
• Transferring files with scp, rsync
• SSH key generation and usage
• Configuring SSH server (sshd_config)

18. Bash Scripting for Automation

• Advanced variables and functions
• Command substitution and exit status
• Script debugging
• Writing scripts for log monitoring, backups, etc.

19. Troubleshooting Techniques

• Diagnosing boot problems
• Fixing broken packages
• Checking disk errors
• Using logs effectively to identify issues