Your App Center List Is Not a Security Audit
I opened Ubuntu's App Center, scrolled through ~90 installed packages, and asked the obvious question: is any of this malware? The list looked suspi…
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A Real Experiment at the Edge of Trust
How ten months of AI-assisted Linux administration gradually turned copy-paste advice into direct access to a real server. When AI stopped being jus…
Linux Security Checklist for Production Servers
A step-by-step practical guide to locking down SSH, configuring firewalls, enforcing least privilege, hardening the kernel, and setting up audit tra…
Fixing a Snapcraft Build that had been Broken for Two Years
As I stated in my introduction , the first piece of work I did on Packet Sender was fix the Snapcraft build. What is Snapcraft? It has been a while…
Sudo vs Root: What's the Difference?
The architectural differences between the root account and sudo delegation, how the SUID bit works, why visudo saves production servers, and how to…
Ubuntu Freezing Touchpad After Login on Matebook X
Problem On my Huawei MateBook X Pro running Ubuntu 26.04 LTS, the built-in touchpad would behave strangely immediately after logging in. The touchpa…
Understanding chmod Without Memorizing Numbers
How Linux file permissions actually work under the hood, why symbolic mode is your best friend, and how to stop blindly typing chmod 777. Every Linu…
Install Hadoop on WSL2 Ubuntu (2026): Complete Step-by-Step Guide
If you've searched "install Hadoop on WSL," you've probably found guides from 2020–2023, most written for WSL1 or old Hadoop 3.2/3.3.0 builds. This…
🚀 Cron vs Systemd Timers vs daemontools — Understanding the Evolution of Linux Job Scheduling & Service Management
While diving deeper into Linux internals and modern SRE practices, I came across a question that many Linux engineers eventually ask: Is cron obsole…
Keep Docker Engine as Your Kubernetes Runtime on Ubuntu with cri-dockerd
Sometimes you genuinely want Docker Engine as the Kubernetes node runtime — a team standardized on the Docker CLI/API for tooling, an image-build bo…
The Linux Skills That Separate Junior and Senior DevOps Engineers: A Practical Comparison
Introduction Many people believe that becoming a senior DevOps engineer means learning Kubernetes, Terraform, or cloud platforms. While those skills…
Set Up a Kubernetes Node on Ubuntu 24.04 with containerd (the Docker-Compatible Runtime)
This is the mainstream way to run Kubernetes "with Docker" on Ubuntu in 2026: containerd as the runtime (the same engine Docker uses under the hood)…
How I Automated Ubuntu Server Hardening with One Script
Securing and Automating a Cloud Server The first time I spun up a cloud server, I thought the hard part was over. It wasn't. The server was open to…
The Great Ubuntu Blackout: My 3-Hour Journey to Fix the Darkness
Introduction It was a perfectly normal day. I opened my laptop, ready to get some work done, and then... BAM. A black screen. Not a gentle fade to b…
Run Kubernetes in Docker on Ubuntu for Local Development
There's a delightfully literal answer to "Kubernetes with Docker": kind — Kubernetes IN Docker. Each node is a Docker container running a full Kuber…
Linux Isn't Hard—You're Learning It the Wrong Way
Stop memorizing commands. Start understanding concepts. Many people believe Linux is difficult because they begin by trying to memorize dozens of te…
24 Days of Coding: An 86-Hour Roadmap from Truck Driver to Web Engineer
1. Introduction Hello from Japan! 🇯🇵 I am an active truck driver in Japan self-studying Python and Web technologies, leveraging my logistics domain…
Getting started (EP-1 of The $0 Cloud)
The idea of having my own server never really interested me until I had a conversation with one of my developer friends. We were discussing how stud…
Zero-Trust Encrypted Backups with Restic on Ubuntu 24.04
Data preservation layouts are no longer just an exercise in handling routine disk failures; they are a direct line of defense in an active cyber-war…
From Docker Build to Kubernetes Deploy on Ubuntu: The Image Workflow That Never Changed
Amid all the noise about dockershim, one thing got lost: the everyday workflow of building an image with Docker and running it on Kubernetes never c…
Automating Ubuntu System Maintenance with Cron Jobs
Keeping your Ubuntu server healthy requires more than installing package updates. Over time, unused packages, cached APT files, and Docker resources…
How to Install Apache Kafka on Ubuntu 26.04 LTS (KRaft Mode, No ZooKeeper)
Table of Contents What is Apache Kafka and When Should You Use It KRaft Mode: Why ZooKeeper is No Longer Needed Prerequisites Step 1: Install Java 2…
How to Manage Dotfiles with GNU Stow (and Rebuild Your Whole Ubuntu Server in One Command)
Every time I got a fresh Ubuntu VPS, I lost half a day to the same ritual: install zsh, copy over my .zshrc , remember which tools I had on the old…
Ansible Installation and Configuration on Ubuntu — Automate Your Server Management
Introduction What is Ansible? Ansible is an automation language that can describe any IT environment, whether homelab or large-scale infrastructure.…
Reverse Proxy Setup + SSL Self-Sign (Root CA + Wildcard)
Pada postingan ini saya akan membahas bagaimana membangun Reverse Proxy Nginx dengan SSL Internal (Self-Signed PKI) tanpa menggunakan domain publik…
Missing network configuration on fresh Ubuntu Server offline installation
Installing Ubuntu Server 24.04 LTS in an offline mode (no LAN cable or WiFi connected) leaves you with an unmanaged network interface which requires…
5 Linux Commands Every Cybersecurity Student Must Know
I'm Ayesha Abbas, a CS student, specializing in cybersecurity and cloud security. I use Linux every single day for my projects and studies. Here are…
When rotating an image isn't actually rotating an image
Early in my career working in a Digitisation environment at some point I would have to become familiar with the process of handling images. Being at…
⚡️Self-Hosting Experience with Jetson Orin Nano and Ollama 🦙
I don't know where to begin. This is a long story, but it all started when I saw that DEV was having a ‘finish-it--up-a-thon’. I was instantly inter…
Qtractor Usage Bible - Volume 1
QTRACTOR BIBLE Volume 1 — Foundations PART I — QTRACTOR CONCEPTS & WORKFLOW MODEL Chapter 1 — What Qtractor Is Quick Start Qtractor is a non-des…