Cloud Explainers labs

The lab files and every command from Cloud Explainers videos, so you can run each demo yourself. Every video also has a full written version, with every diagram, on cloudexplainers.com. One folder per video, newest first.

Video	Written version	Lab
Linux Makefiles Will Finally Make Sense After This	page	linux-makefiles-make-sense
SAML vs OAuth vs OpenID Connect: What's the Difference?	page	saml-vs-oauth-vs-oidc
How to Fix Python cron Jobs That Never Run	page	python-cron-jobs-fix
Linux Bash Scripting: Full Tutorial for Beginners	page	linux-bash-scripting
How PXE Network Boot Works	page	pxe-boot-works
How Active Directory Works	page	active-directory-works
How to Fix a Linux systemd Service That Won't Start	page	linux-systemd-service-fix
Linux Logs: syslog vs journald	page	linux-logs-syslog-journald
JWT vs Session Cookies: Which One Should You Use?	page	jwt-vs-session-cookies
Docker vs Docker Compose: Which One Should You Use?	page	docker-vs-compose
How to Fix Docker Compose Containers That Can't Talk to Each Other	page	docker-compose-network-fix
Django Full Tutorial for Beginners	page	django-tutorial
How Linux systemd Works	page	linux-systemd-works
How to Fix 'Windows Cannot Access' Network Share Errors (SMB)	page	windows-share-fix
REST vs gRPC: Which One Should You Use?	page	rest-vs-grpc
How to Fix SSL Certificate Chain Errors (Missing Intermediate)	page	ssl-chain-fix
Every Python Concept for Beginners in 10 Minutes	page	python-concepts-every
Every SQL Join Type in 10 Minutes	page	sql-joins-every
Why OpenRouter Free Models Hit Their Limit So Fast	page	openrouter-free-limits
Why Your Gemini API Free Tier Runs Out So Fast	page	gemini-free-tier-why
OpenRouter Will Finally Make Sense After This	page	openrouter-make-sense
How Redis Caching Works	page	redis-caching-works
Gemini API vs Vertex AI: Which One Should You Use?	page	gemini-api-vs-vertex-ai
How to Fix a Leaked Gemini API Key	page	gemini-leaked-key-fix
Why Golang Uses Goroutines Instead of Threads	page	golang-goroutines-threads
How to Fix Gemini API Error 429: Resource Exhausted	page	gemini-api-429-fix
Claude Token Pricing Will Finally Make Sense After This	page	claude-token-pricing
Why Python Web Scraping Returns Nothing (and the Fix)	page	python-web-scraping-empty
Python uv vs pip: Which One Should You Use?	page	python-uv-vs-pip
Python Automation: Full Tutorial for Beginners	page	python-automation-tutorial
How OAuth Login Works	page	oauth-login-works
Google AI Studio Will Finally Make Sense After This	page	google-ai-studio-make-sense
What Happens When You Run a Docker Container	page	docker-run-what-happens
How to Fix Claude Code Billing Your API Key Instead of Your Plan	page	claude-code-api-key-billing
Why Passkeys Can't Be Phished Like Passwords	page	passkeys-phishing-why
PowerShell vs Bash: Which One Should You Learn?	page	powershell-vs-bash
The Linux Roadmap for Beginners	page	linux-roadmap
Django vs FastAPI: Which One Should You Use?	page	django-vs-fastapi
Why SQLite Is the Most Used Database in the World	page	sqlite-most-used-why
How a NoSQL Database Like MongoDB Works	page	mongodb-works
How to Fix Python pip error: externally-managed-environment	page	python-pip-externally-managed
How to Fix MySQL Too Many Connections Database Errors	page	mysql-too-many-connections
Golang Concurrency Will Finally Make Sense After This	page	go-concurrency
How Amazon S3 Works	page	s3-works
How Kubernetes Works	page	kubernetes-works
How Git Works	page	git-works
How to Fix Docker Port Already Allocated Errors	page	docker-port-allocated
How PostgreSQL Works	page	postgresql-works
How to Fix Git Merge Conflicts	page	git-merge-conflicts
How to Fix No Space Left on Device in Linux	page	linux-disk-full
How the Internet Works	page	how-internet-works
SQL vs NoSQL: When Each One Wins	page	sql-vs-nosql
Claude API vs Claude Pro: Why Your Subscription Doesn't Include It	page	claude-api-vs-pro
How to Fix JWT Token Expired Errors (401 Unauthorized)	page	jwt-token-expired
Why AI Agent Skills Beat Giant Prompts	page	skills-vs-giant-prompts
Linux Cron Jobs Will Finally Make Sense After This	page	linux-cron-jobs
Security Logs Will Finally Make Sense After This	page	security-logs-make-sense
How to Fix a Security Leak: An API Key Pushed to GitHub	page	api-key-leak-git
DNS Will Finally Make Sense After This	page	dns-make-sense
Never Ignore a Security Update	page	never-ignore-updates
Two-Factor Authentication Will Finally Make Sense	page	two-factor-make-sense
Never Expose a Database to the Internet	page	never-expose-database
SSH Keys vs Passwords: Which Is Safer for Security?	page	ssh-keys-vs-passwords
The 5 Levels of Linux Boot: From Power On to Login	page	linux-boot-levels
The 5 Levels of Network Firewalls	page	network-firewalls-levels
Password Security: Why Hackers Crack Weak Passwords	page	password-security
Why Your Linux Server Runs Out of Memory	page	linux-out-of-memory
HTTP vs HTTPS: What Actually Changes on Your Network	page	http-vs-https
Every Linux File Permission You Need to Know	page	linux-file-permissions
Linux Processes vs Threads: When Each One Wins	page	linux-processes-threads
The OSI Model Will Finally Make Sense After This	page	osi-model
The 7 Levels of Git	page	git-levels
Every Network Troubleshooting Command You Need	page	network-troubleshooting
Hashing vs Encryption in Cybersecurity: When Each One Wins	page	hashing-vs-encryption
Why the Internet Ran Out of IP Addresses	page	internet-ran-out-ip
Linux Package Managers: apt vs Snap vs Flatpak	page	linux-package-managers
Why Python Is Slow (and When It Doesn't Matter)	page	python-slow-why
TCP vs UDP: When Each One Wins	page	tcp-vs-udp
Stop Running Linux as Root (Do This Instead)	page	linux-stop-root
Linux Users and Groups Will Finally Make Sense	page	linux-users-groups
Why Phishing Beats Good Security (and How to Spot It)	page	phishing-beats-security
The 7 Levels of Docker	page	docker-levels
AI Agents Will Finally Make Sense After This	page	ai-agents-make-sense
Stop Using git push --force (Use This Instead)	page	git-push-force
Agent Skills vs MCP: When Each One Wins	page	skills-vs-mcp
Networking Will Finally Make Sense After This	page	networking-make-sense
Every Linux Command You Actually Need	page	linux-commands-every
The 7 Levels of Cybersecurity	page	cybersecurity-levels
Every System Design Concept You Need, in One Diagram	page	system-design-every
Why PostgreSQL Ignores Your Index	page	postgres-ignores-index

Run labs in a throwaway machine or container. Lab files are MIT licensed (LICENSE).