Myna on Ubuntu 26.10: Install & Extend the First Offline AI Assistant
Myna on Ubuntu 26.10: How to Install, Use, and Extend the First Offline Linux AI Assistant Introduction Ubuntu 26.10 ships with Myna , the first ful…
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CVE-2026-67401 Analysis — cPanel & WHM EmailTrack SQL Injection, From Mail Account to Root
Vulnerability Overview Item Detail CVE ID CVE-2026-67401 Component cPanel & WHM — EmailTrack (Email ▸ Track Delivery) Vulnerability class CWE-89…
Fix xrdp Black Screen on Ubuntu 24.04: Session Startup
TL;DR: Install XFCE, set ~/.xsession to start it, then terminate only the affected xrdp session and reconnect. The problem After an RDP login to Ubu…
CVE-2026-31431 \"Copy Fail\": A Deep Dive into the Linux algif_aead Privilege Escalation
Vulnerability Overview Field Detail CVE ID CVE-2026-31431 Nickname Copy Fail CVSS 3.1 7.8 (HIGH) — AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Affected comp…
Installing and setting up Postgres in Ubuntu
At work, we handle a lot of short-term projects, typically lasting 3-8 weeks. These projects don't require a complex deployment setup. Instead, we d…
My Weekly Tech Digest: What I Learned in Linux Essentials with Akwannya Hub
This week, I dove deep into the core concepts of the Linux Essentials course organized by Akwannya Hub. Here is a quick breakdown of everything I co…
I got tired of checking which process was using my ports, so I built Portop
If you work with Linux long enough, you've probably seen this: bind: address already in use And then the usual routine starts. ss -tlnp lsof -i :808…
CVE-2026-16723: Pre-Auth RCE in Fastjson 1.x via the @JSONType Trust Branch
Overview CVE ID CVE-2026-16723 Affected Fastjson 1.2.68 – 1.2.83 (every 1.x release still receiving use) Preconditions Spring Boot executable fat-JA…
Installing Ruby on Ubuntu 24.04
Ruby is a dynamic, object-oriented programming language perfect for creating basic scripts to complex web applications. It offers a modern syntax fo…
CVE-2026-12243 — How a Percent-Encoded Slash Bypasses NLTK's Path Traversal Guard
CVE ID CVE-2026-12243 Affects NLTK (Natural Language Toolkit) ≤ 3.9.4 Weakness CWE-22 (Path Traversal) CVSS 3.1 7.5 High — AV:N/AC:L/PR:N/UI:N/S:U/C…
Installing OpenVPN on Ubuntu 24.04
OpenVPN is an open-source, full-featured VPN solution that enables secure site-to-site and point-to-point connections. OpenVPN creates encrypted tun…
Installing WordPress on Ubuntu 24.04
WordPress is a free, open-source content management system (CMS) built with PHP and backed by MySQL or MariaDB. It began as a blogging tool and has…
Installing Git on Ubuntu 24.04
Git is an open-source distributed version control system used to track changes in projects and during software development. Git allows multiple cont…
Deploying a Matrix Synapse Chat Server with Element on Ubuntu 22.04
Matrix is a set of open APIs for decentralized and end-to-end encrypted communication. It works across a collection of federation servers to deliver…
If you're just about to switch to Linux, read this.
Well...Well...Well... You’re probably tired of Windows, too—or maybe you just want something new , And you think Linux is an interesting option, you…
Installing Mosquitto MQTT Broker on Ubuntu 24.04
Mosquitto is an open-source message broker implementing the MQTT (Message Queuing Telemetry Transport) protocol — a lightweight TCP/IP messaging pla…
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…
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…