Linux Handbook

Short one this week my friend, energy's a bit low on my end, but two kernel vulnerabilities landed that are too important to skip, so let's get into it. Two old, nasty kernel bugs got public exploits this week. If you're running KVM or any kind of multi-tenant containers, this is a "patch today, not this weekend" situation. GhostLock (CVE-2026-43499) is a 15-year-old use-after-free bug in the Linux kernel's futex/rtmutex subsystem.

There's a moment every Linux user eventually hits, you need to access something on a remote machine, but it's not exposed to the internet. Maybe it's a database running on port 5432, a local web app on port 3000, or a service hidden behind a firewall. The "obvious" solution is to punch a hole in the firewall and expose it. The *right* solution is SSH tunneling. I started using SSH tunnels out of necessity.

A good Linux user takes notes all the time. A better Linux user organizes them in a proper knowledge base. From Obsidian to Tolaria, there are plenty of choices. You could explore some self-hosted knowledge base tools that may even help your team. If your knowledge base grows bigger, you can plugin an AI and get answers from your personal notes. Lately, we have been exploring AI... local AI mostly with open source models running on your machine and keeping the data private on your system.

My Downloads folder is a crime scene. My home directo Thousands of files with names like IMG_2048.jpg, Copy_of_final_FINAL_v3.pdf, and untitled(2).docx accumulated over years of telling myself I'd sort it out later. I never did. I tried manual sorting. I tried renaming scripts. Nothing stuck because the real problem isn't laziness, it's that I don't know what half the files actually are without opening them first. AI File Sorter takes a different approach.

I spent time evaluating these across personal homelab setups, team documentation workflows, and AI-augmented note-taking, filtering down to 11 tools that solve real problems that cloud-only solutions like Notion and Confluence leave unaddressed. There's a reason self-hosted knowledge bases are surging in interest right now: local AI integration.

I manage my project boards in Fizzy, Basecamp's clean, opinionated kanban tool, and I got tired of the same ritual: open the browser, navigate to the board, drag a card, close the tab, back to work, repeat. The board lives in one app, my actual work lives somewhere else, and that context switching chips away at focus more than I'd like to admit. So I decided to fix it. Here's what I did.

I have thousands of notes. Obsidian vaults, random Markdown files, half-finished research documents, meeting notes from three years ago. And for the longest time, they just sat there, searchable by filename, searchable by keyword, but never actually understood. Then one evening I thought, What if I could just ask my notes a question? You might be thinking the ChatGPT already does that, but it does not have access to your local workspace.

Our 20th course is now available ๐Ÿพ This one is about log management with ELK stack. Actually, it's not ELK. Instead of Elastic Search, we used OpenSearch. The course gives you the basics along with sample labs to follow. This is available for Pro members only. Not a Pro member yet? Upgrade to Pro membership and access all 20 courses, 6 eBooks and every other premium content. Log Management Course (ELK Stack with OpenSearch) Stop SSH-ing into servers at 2 AM.

I have been learning DevOps for a while now. The problem is not finding DevOps content on YouTube. There is plenty of it. The problem is knowing which channels are actually worth your time. Some channels drop theory at you for 45 minutes without touching a terminal. Others teach outdated tooling. A few are genuinely excellent - structured, practical, updated, and respected by the community.

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