If the Linux desktop and applications on your thin and light laptop or low-end PC feel sluggish under a busy session, the usual suspects are slow storage R/W, not enough RAM, or occasionally…
Every sysadmin has a set of commands they type dozens of times per day. Long ssh strings, grep pipelines, systemctl restarts, directory jumps. You type them, you forget a flag, you retype them….
Scheduling recurring tasks is one of those things every Linux user eventually needs to do. For decades, cron was the only real option. It is still everywhere, still works, and still makes sense…
The curl command in Linux is one of those tools that looks simple on the surface but has surprising depth once you start using it regularly. Most people know it as “that command…
The strace command in Linux separates the sysadmins who guess from the ones who actually know what’s happening. When a process misbehaves, hangs, eats CPU, or refuses to start, strace shows you exactly…
Setting up a Linux server is one of the best ways to learn Linux and server management hands-on. Linux servers offer unmatched flexibility, performance, and control for hosting services, running applications, supporting production…
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,…
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,…
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…
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…
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…
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…
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…
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…
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…
Raspberry Pi board has earned its reputation as one of the most versatile and capable single-board computers ever made. From home labs, to kiosks and lightweight infrastructure, the hardware itself is rarely the…
As we stand on the brink of 2024, 2025, 2026 AI has already established itself as an essential collaborator in the workplace. The relationship between humans and AI is growing, moving beyond just…
“A more targeted list that includes 50 server and observability solutions for 2026” Back in 2014, I compiled a list of top server and application performance monitoring solutions. Sharing that list publicly was a great…
