DNS Explained for Developers: Records, TTL and "Propagation"
A, AAAA, CNAME, MX, TXT and NS records in plain English, why DNS changes seem slow, and the troubleshooting commands that tell you what is really going on.
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Tips & writing
Notes from the workbench
Practical engineering tips, design theory and performance breakdowns — written for developers and founders who like their advice tested in production.
Filtering by tag #devops — clear
HTTPS, SSL and TLS Explained: How Your Site Stays Secure
What actually happens when a browser shows the padlock, how certificates prove identity, why free certificates are just as secure, and how to fix mixed content and expiry problems.
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Free CI/CD with GitHub Actions: A Practical Starter Guide
Automate tests, linting, builds and deploys on every push, for free on public repos. A practical GitHub Actions guide with copy-paste workflows, caching, secrets and scheduled jobs.
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Leaked an API Key on GitHub? Do This in the Next 10 Minutes
Bots scan public repositories for secrets constantly. If you pushed a key, deleting it isn't enough. The exact order of steps: revoke, check for damage, clean history, and prevent a repeat.
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Database Migrations Best Practices: Change Your Schema Without Fear
Schema changes cause more scary deploys than almost anything else. How migrations work, the rules that keep them safe, and the expand-and-contract pattern for changes with zero downtime.
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Database Backups: A Simple Strategy That Actually Works
Backups are only real if you can restore them. The 3-2-1 rule, logical dumps vs point-in-time recovery, how often to back up, and the restore drill that most teams skip until it's too late.
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Localhost vs 127.0.0.1 in .env: The Bug That Only Appears on Windows
Same code. Same .env. Works on my Linux box, dies on the Windows server with ECONNREFUSED ::1:3306. Here's what localhost actually does under the hood, why 127.0.0.1 is not always the same thing, and the rules I now follow in every .env file.
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Linux Command Line Basics Every Web Developer Needs
Servers, containers and CI all speak Linux. The commands you'll actually use for files, searching, processes, logs, permissions and networking, plus pipes that turn small tools into superpowers.
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SSH Keys Explained: Secure Logins for Servers and Git
Passwords are the weakest way to log in to a server. How SSH keys work, how to create and use them for servers and GitHub, and the configuration that keeps your machines locked down.
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