sed Command in Linux: with Real Examples
If you’ve spent any time on the Linux command line, you’ve probably seen the sed command used in a one-liner and thought “I should learn that properly.” Most people pick it up piecemeal,…
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Cloudflare with Discourse: Setup Guide (WAF & Security Rules)
I run a Discourse forum behind Cloudflare, and getting the WAF rules right took more trial and error than I expected. Discourse is a Ruby on Rails application that most people self-host in…
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Reduce Disk Writes on Debian & Ubuntu (Server & Desktop)
Every write to disk costs something, whether it’s wearing down an SSD, slowing I/O on a busy server, or draining battery on a laptop. One of the biggest offenders is logging. Between systemd-journald,…
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What to buy for your Raspberry Pi 4
Update 2026: This article has been updated to fix broken links and verify long-term reliability. After 4 years, every device recommended below is still working in my lab, including multiple SD cards that…
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Securing Linux with SELinux (or AppArmor)
SELinux and AppArmor have been around for many years, but are still essential for maintaining a secure Linux environment. This article will cover how to set them up and troubleshoot these mandatory access…
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Ncdu Command in Linux: Disk Usage Analysis with Examples
This article is a follow-up to the previous 90 Linux Commands Frequently Used by Linux Sysadmins post. As time allows, I will continue to publish articles on each of these 90 commands, geared toward…
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8 types of web applications
Feb 23, 2026 Summarize with: Web applications are the digital tools you rely on every day to work, communicate, shop, and manage information directly through a browser. From email and online banking to…
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Dewedda.com – A weather side project for where I live
I’ve been spending the past month or so working on a hobby project I started last year, a weather and hurricane tracking site built for the Eastern Caribbean. I figured it was worth…
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VPS IOPS vs. Latency: Why NVMe Benchmarks Lie
Every VPS provider loves to advertise NVMe storage. It sounds fast on paper and is usually a noticeable upgrade over older disk (HDD) and traditional SSD storage. The problem is that those IOPS…
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Why Small VPSs Feel Slower Than They Used To
Servers aren’t what they used to be. If you’ve spun up a small VPS (Virtual Private Server) recently and felt underwhelmed by its snappiness, you’re not alone. A basic 1-core CPU with 1…
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Why Your Linux Server “Looks Idle” but “Feels” Slow
Servers can sometimes appear idle yet still perform sluggishly. This scenario is common across web hosting servers, database servers, VPS or cloud instances, or even containerized workloads. In all mainstream Linux distributions, the…
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How to Keep ConfigServer Firewall (CSF) Running After the Shutdown
Update: CSF Project Status (January 2026) – Since the original publication of this article, there have been key developments in how ConfigServer Security & Firewall (CSF) is maintained following the shutdown of Way to…
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Why server health monitoring is non-negotiable for enterprise success
What if your servers crashed during your biggest sales event of the year? For enterprise IT leaders, that’s not a dramatic opening it’s a recurring risk. A few minutes of downtime can stall…
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What is organic traffic and how it works
Jan 09, 2026 Ariffud M. Summarize with: Organic traffic is the stream of visitors who land on your website by clicking unpaid search results on search engines like Google, Bing, or Yahoo. For…
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How many websites are there? Key statistics and growth trends
Dec 24, 2025 Daniela C. Summarize with: The number of websites in the world changes every second, with new domains going live, older sites disappearing, and millions sitting inactive – and the pace…
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What is Linux iowait? (Explained With Examples)
iowait (wait, wa, %iowait, wait%, or I/O wait) is often displayed by command-line Linux system monitoring tools such as top, sar, atop, and others. On its own, it’s one of many performance stats that…
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Choosing a Network Switch – 6 Essential Tips
Choosing a switch can feel deceptively simple, until slow file transfers, port shortages, and similar unexpected upgrade costs remind you otherwise. Before you click “Buy,” it helps to step back and look at…
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Guide to Optimizing PHP for High Traffic Sites
Note: This article serves as an overview and index, connecting you to previous detailed PHP optimization articles. For comprehensive insights on each topic, please follow the provided links to previous articles under the…
