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This blog is a personal technical blog about Linux, homelabs, computer security, old hardware, laptops, honeypots, Docker, firewalls, backups and practical sysadmin experiments.

If you want to contact me about the blog, you can use the comments section on relevant posts or reach out by email.

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miguelsea [at] proton.me

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OpenCanary Honeypot on Ubuntu: 2026 Home Lab Setup Guide

I first wrote about OpenCanary years ago, and that old version badly needed an update. The tool is still useful, but the way I would deploy it in a home lab today is different: newer Ubuntu versions, Python 3, Docker as an option, cleaner logging, and no copy-pasted example credentials that look like something someone might actually reuse. This guide is the updated version: how I would set up an OpenCanary honeypot on Ubuntu in 2026 for a small home network or homelab. The goal is not to trap random people on the internet. The goal is to create a quiet internal warning system: a fake service that should never be touched, so any connection to it deserves attention. Important: this is a defensive security guide. Run OpenCanary only on systems and networks you own or have permission to monitor. Do not expose a honeypot to the public internet unless you understand the logging, legal, abuse and maintenance implications. If you are building a Linux home server security setup fro...

Lenovo ThinkPad X250 on Linux: Tweaks, Undervolting, Battery Life and 2026 Update

I wanted a cheap, small, serviceable Linux laptop. Something light enough to carry, easy enough to repair, and inexpensive enough that upgrades would still make sense. The Lenovo ThinkPad X250 was a good candidate because it has a 12.5-inch form factor, a proper ThinkPad keyboard, SSD upgrade options, replaceable parts, Ethernet, docking support and generally good Linux compatibility. I found one on eBay for around 130€ : an Intel Core i5-5300U model with 8GB RAM , a 128GB SSD , two batteries and an HD screen with a small bruise. The plan was simple: clean it, repaste it, upgrade the SSD, install Linux Mint, undervolt it and see how useful it could still be. This post started as my original 2019 notes about tweaking the Lenovo X250 in Linux. I have now updated it with a 2026 perspective, cleaner instructions, better internal links and a more realistic look at whether this old ThinkPad is still worth using. Related posts: Linux Home Server Security Checklist Docker Secu...

Strong, Unique Passwords Without Losing Your Mind

Last updated: May 27, 2026 Password Security in 2026: Password Managers, Passkeys & 2FA for Real People Password Security in 2026: Password Managers, Passkeys & 2FA That Actually Work Most people do not have a weak-password problem. They have a reused-password problem. You can invent the cleverest password in the world, but if you use it on twenty websites and one of them gets breached, you suddenly have twenty compromised accounts. That is how most real-world account takeovers happen in 2026. Not elite hackers brute-forcing your login from a dark room somewhere. Just automated credential stuffing using databases leaked years ago from services you forgot existed. One old forum breach becomes access to your email, cloud storage, streaming services, VPN account, and eventually your homelab dashboard because the same password got reused everywhere. This guide explains how to handle passwords properly today: without paranoia, without enterprise co...

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