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How HTTPS Certificates Renew Themselves: Let's Encrypt and ACME Explained
Blog Summary
A tiny program on your server renews your HTTPS certificate while you sleep, until one day it quietly doesn't. How ACME and certbot work, why renewals fail months later, and the outside check that saves you.
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Containers vs Virtual Machines: What's Actually Different Under the Hood
Blog Summary
"A container is just a lightweight VM" is the most common explanation, and it's wrong in the ways that matter. Here's how hypervisors and shared kernels really differ, what that means for isolation and speed, and when to use which.
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MCP Joins the Linux Foundation: Why It Matters for Developers
Blog Summary
On 9 December 2025, Anthropic donated the Model Context Protocol to the new Agentic AI Foundation under the Linux Foundation, co-founded with OpenAI and Block. What neutral governance means for anyone building AI integrations.
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Server Monitoring Basics: What to Watch Before Your Users Complain
Blog Summary
If your customers are your monitoring system, you hear about outages late and angry. Here's what to actually watch: disk trends, p95 response times, error rates, queue depth, scheduler heartbeats and uptime checks.
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SSH Keys Explained: How They Work and How to Use Them Safely
Blog Summary
Bots try passwords on every server, all day. SSH keys make that pointless. Here's how key pairs work, a step-by-step ed25519 setup, the sshd_config gotcha that keeps passwords on, and habits that keep keys safe.
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01. About Shiroz
Mohammed Shiroz
Hi, I'm Mohammed Shiroz, a software engineer and AI enthusiast from Sri Lanka who turns ideas into intelligent, real-world solutions. With over 9 years of hands-on experience, I currently lead real estate ERP development at Kate Group, a...
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