CourseLinux Complete Course: Zero to Production Ready

1 Module 1: Getting a Linux machine 5 lessons · 29 min

2 Module 2: Shell fundamentals 7 lessons · 34 min

Linux Terminal Basics: the Prompt, Commands, and Getting Help (man, --help, tldr) 5:21
Navigate the Linux Filesystem: pwd, ls, cd and Where Everything Lives 5:09
Linux Files for Beginners: Create, Copy, Move and Delete Safely 5:39
View and Edit Files in Linux: cat, less, head, tail, nano and vim 5:04
Linux Pipes and Redirection for Beginners (|, >, >>, 2>&1) - with Real Logs 5:08
How to Find Files and Text in Linux: find, grep and locate 5:30
Linux Course: Module 2 Recap and What's Next 1:53

3 Module 3: Users, permissions, privilege 7 lessons · 39 min

Linux Users and Groups for Beginners: useradd, groupadd, usermod and id 5:17
Linux File Permissions and Ownership Explained (chmod, chown, ls -l) 5:45
Linux sudo Done Right: Least Privilege with visudo and sudoers.d 5:35
Linux Shared Folders: umask, setgid and the Sticky Bit Explained 5:57
Linux ACLs for Beginners: setfacl and getfacl Explained 5:28
Linux Permissions Lab: Lock Down a Shared Project Folder 9:29
Linux Course: Module 3 Recap - You've Finished Linux Basics 1:54

4 Module 4: Software and processes 8 lessons · 41 min

Linux Package Managers: apt and dnf for Beginners 6:06
Linux Repositories and GPG Keys: Add Software You Can Trust 5:56
Linux Processes and Signals: ps, top, htop and kill 4:54
Linux Jobs, nohup and tmux: Keep Programs Running After You Disconnect 4:27
Linux cron and systemd Timers: Schedule Jobs for Beginners 5:09
Automatic Security Updates on Ubuntu with unattended-upgrades 5:06
Linux Course: Module 4 Recap - Software and Processes 1:29
Linux Incident: The Disk Is Full (No Space Left on Device) 8:07

5 Module 5: systemd and services 6 lessons · 29 min

How Linux Boots: GRUB, the Kernel, and systemd Explained 5:02
systemctl for Beginners: Start, Stop, Reload and Enable Linux Services 5:02
Write Your Own systemd Service and Timer (Unit Files for Beginners) 5:26
Linux Logs for Beginners: journalctl and /var/log 4:49
Harden a systemd Service: Dedicated User and Sandboxing (Lab) 7:35
Linux Course: Module 5 Recap - systemd and Services 1:30

6 Module 6: Storage 7 lessons · 33 min

Linux Disks, Partitions and Filesystems: Add a New Disk to a Server 5:08
Linux /etc/fstab for Beginners: Mount a Disk Permanently (and Safely) 5:20
Linux LVM for Beginners: Grow a Volume Without Downtime 5:09
Linux Disk Usage: df, du and ncdu, and Cleaning Up Safely 4:39
Linux Backups for Beginners: rsync, tar, and Testing the Restore 5:30
Linux Course: Module 6 Recap - Storage 1:28
Linux Incident: A systemd Service Crashes and Won't Stay Up 5:53

7 Module 7: Networking 8 lessons · 37 min

IP Addresses, DNS and Routing on Linux: The Basics 5:19
Inspect a Linux Server's Network: ss, dig, curl and nc 4:12
Linux Firewalls for Beginners: ufw (and nftables underneath) 4:40
Harden SSH and Install fail2ban on Ubuntu 6:11
Nginx for Beginners: Your Own Site File and a Reverse Proxy 5:37
Free HTTPS with Let's Encrypt and Nginx on Ubuntu 5:12
Linux Course: Module 7 Recap - Networking 1:32
Linux Incident: A Firewall Change Takes the Website Offline 4:24

8 Module 8: Bash scripting and automation 7 lessons · 30 min

Your First Bash Script: Variables, Quoting and Running It 4:33
Bash Conditions and Loops: if, test and for 4:16
Bash Functions, Arguments and Exit Codes 4:42
Safe Bash Scripts: set -euo pipefail and shellcheck 5:17
awk, sed and cut: Analyse an Nginx Log on Linux 4:45
Intro to Ansible: Configure a Linux Server the Same Way, Every Time 5:24
Linux Course: Module 8 Recap - Bash Scripting and Automation 1:28

9 Module 9: Security and hardening 7 lessons · 31 min

Linux Security Audit with Lynis (and the CIS Benchmarks) 5:32
AppArmor for Beginners: Confine a Program (and Never Turn It Off) 5:39
Linux Auditing with auditd: Who Opened That File? 5:06
Secrets on a Linux Server: Keep Keys Out of Files and Shell History 4:23
Patching an Ubuntu Server and Checking CVEs with pro fix 4:06
Linux Course: Module 9 Recap - Security and Hardening 1:34
Linux Incident: A Bad Deploy Makes Nginx Return 502 Bad Gateway 4:25

10 Module 10: Observability with CloudWatch 10 lessons · 54 min

Why Observability Matters: Metrics, Logs and Alarms on a Linux Server 5:23
Give an EC2 Server CloudWatch Permission with an Instance Role (Never Access Keys) 5:41
Install the CloudWatch Agent on Ubuntu and Send Memory and Disk Metrics 5:07
Send Nginx, Auth and System Logs to CloudWatch Logs with the CloudWatch Agent 5:29
CloudWatch Logs Insights and Metric Filters: Count Nginx Errors and Failed SSH Logins 7:35
Build a CloudWatch Dashboard for a Linux Web Server: CPU, Memory, Disk, Errors and Logs 7:46
CloudWatch Alarms with SNS Email: Get Told When Your Linux Server Breaks 6:24
Share a CloudWatch Dashboard Safely (and Why Not a Public Link) 5:04
Linux Course: Module 10 Recap - Observability with CloudWatch 1:23
Linux Incident: A CloudWatch Alarm at 2am and a Service That Stopped Itself 3:48

11 Module 11: Operating in production 6 lessons · 27 min

CloudWatch Dashboard as Code with Terraform (Alarms and Metric Filters Too) 6:20
Linux Performance Troubleshooting: From the CloudWatch Dashboard to the Process 4:31
Containers on Linux for Beginners: Namespaces, cgroups and Docker 4:37
A Linux Troubleshooting Runbook: One Method for Any Incident 3:41
Linux Capstone: Build, Harden and Monitor a Production Web Server from Scratch 6:35
Linux Course: Module 11 Recap - Operating in Production (and the End of the Course) 1:18

Lesson 5 of 78

Linux Course: Module 1 Recap and What’s Next

What you’ll learn

What you built in Module 1, Getting a Linux machine
What's coming in Module 2, Shell fundamentals
How to join the next batch and follow the course

Module 1 recap

Four lessons ago, Cornelis Threads had no server, and no website. Now it has both. Here's everything we covered in Module 1.

Four lessons ago, Cornelis Threads had no server, and no website. Now it has both. Here's everything we covered in Module 1.

You know what Linux is, and why servers run it. You launched your own Ubuntu server, with SSH open only to you, and you know how to undo a broken server with a snapshot.

You know what Linux is, and why servers run it. You launched your own Ubuntu server, with SSH open only to you, and you know how to undo a broken server with a snapshot.

You connect with one short command, and a key nobody can guess. And the shop's first page is live on the internet, served by Nginx, from your own server.

You connect with one short command, and a key nobody can guess. And the shop's first page is live on the internet, served by Nginx, from your own server.

Coming in Module 2

But you typed some commands you don't fully understand yet. In Module 2, Shell fundamentals, that changes. The shop wants changes to the website, and help with its files.

But you typed some commands you don't fully understand yet. In Module 2, Shell fundamentals, that changes. The shop wants changes to the website, and help with its files.

You'll get help from Linux itself, find your way around the filesystem, sort files without losing any, edit the live homepage, turn a web log into answers with one line, and find anything on the server.

You'll get help from Linux itself, find your way around the filesystem, sort files without losing any, edit the live homepage, turn a web log into answers with one line, and find anything on the server.

Keep learning with us

If you want to go further, or support what we do, register for our upcoming batch at training.thecornelis.com.

If you want to go further, or support what we do, register for our upcoming batch at training.thecornelis.com.

And subscribe, and follow us on all our social media, so you never miss a new lesson. You'll find every link in the description.

And subscribe, and follow us on all our social media, so you never miss a new lesson. You'll find every link in the description.

Summary

Module 1 – Linux, a safe lab, SSH with keys, and a website live
Module 2 – at home in the shell
Register for the next batch at training.thecornelis.com
Subscribe and follow so you don't miss a lesson

What’s next

Thanks for learning with us. See you in Module 2, where you get at home in the shell.