Linux Command Line for Support, Cloud and DevOps

What's inside

1. Level 1: Your First Linux TerminalFree
   Set up a free Linux environment (WSL with Ubuntu, a cloud shell or a small VM) and learn what the terminal, the shell and the prompt are, then run your first commands and find help for them.
2. Level 2: The File System Layout and NavigationFree
   Learn how Linux arranges everything under one root directory and move around it with pwd, cd and ls using absolute and relative paths.
3. Level 3: Create, Copy, Move and Delete
   Manage files and directories safely with mkdir, touch, cp, mv and rm, and select many files at once with wildcards.
4. Level 4: Reading and Editing Files
   Read files of any size with cat, less, head and tail, follow a growing log with tail -f, and edit config files in nano with a first, survivable look at vim.
5. Level 5: File Permissions and chmod
   Read the read, write and execute permissions for the owner, group and others shown by ls -l, and change them with chmod in symbolic and numeric form.
6. Level 6: Users, Groups, sudo and chown
   Manage user accounts and groups, run admin commands safely with sudo, and change who owns a file with chown.
7. Level 7: Pipes and Redirection
   Chain commands with the pipe and send output and errors into files with >, >>, 2> and 2>&1, so that small tools work together.
8. Level 8: Finding Files and Text with find and grep
   Find files by name, type, size and age with find, and search inside files for text and patterns with grep.
9. Level 9: Slicing Text with sort, uniq, cut and awk
   Turn raw log and CSV lines into answers by sorting, counting duplicates, pulling out columns with cut, and printing fields with simple awk programs.
10. Level 10: Environment Variables and PATH
    Learn how the shell stores settings in variables, how PATH decides which program runs, and how to make changes last in ~/.bashrc.
11. Level 11: Processes with ps, top and kill
    See what is running, find out what is using CPU and memory, and stop misbehaving processes with the right signal.
12. Level 12: systemd Services and journalctl
    Control long-running services with systemctl and read their logs with journalctl, the daily tools for checking a service on a modern server.
13. Level 13: Installing Software with apt and dnf
    Install, update and remove software from package repositories with apt on Ubuntu, and use the matching dnf commands on Red Hat family systems.
14. Level 14: Disk Space, Mounts and tar Archives
    Find out what is filling a disk, see how file systems are mounted, and pack, compress and unpack files with tar for backups and transfers.
15. Level 15: Network Diagnostics: ip, ss, curl and dig
    Work through network problems one layer at a time: check addresses and routes, see which ports are listening, test HTTP endpoints and look up DNS records.
16. Level 16: SSH Keys and Remote Sessions
    Log in to remote Linux machines securely with SSH key pairs, copy files across, and save connection settings in an SSH config file.
17. Level 17: Bash Scripts and Scheduling with cron
    Write a simple Bash script with variables, conditions and loops, then schedule it with cron so that it runs on its own.
18. Level 18: Final Challenge: Troubleshoot a Broken Server Exam
    Use the whole course on a staged support incident: read logs step by step to find the cause, then fix the service, its permissions, disk space and network, and automate a check.

Access

The first 2 levels are free with a free account. Every level, the podcast edition and the AI tutor come with All Access at £4.99/month or any Creator plan — see pricing.

Start free →