Category: linux
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Stop Trusting Devices. Start Controlling Them.
Stop Trusting Devices. Start Controlling Them. An Introduction to udev. In the last few posts, we have been asking uncomfortable but necessary questions. Where did my disk space go? Why is this system slow right now? What is listening on the network? Now it is time to ask a question most administrators never ask until…
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Who Is Eating the Bandwidth?
Correlating Network Throughput With Real Processes You now know what is listening. You know who is talking. The next question is unavoidable. “Which process is actually costing me performance?” This is where many troubleshooting efforts fall apart. CPU looks fine. Memory looks stable. Disk is quiet. Yet the system still feels slow. At that point,…
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Finding What’s Listening on the Network
If the system is slow, you look at processes. If the system feels exposed, unstable, or compromised, you look at the network. The next inevitable question is not theoretical. It is operational: “Who is listening on this system, and why?” Open ports are not neutral. Every listening socket is a decision someone made, intentionally or…
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Finding the Process That’s Eating Your System
In the last installment in our current series, we answered the question “Where did my disk space go?”. Now, we will tackle the question: “Why is this system slow right now?” When Linux systems feel sluggish, unresponsive, or outright hostile, the root cause is almost always the same. Something is running that should not be,…
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Finding the Disk Space Culprit
Disk space does not just disappear. It gets taken. When a system runs out of space, the problem is rarely the disk itself. The problem is not knowing what is consuming it. du exists for that exact moment. It tells you where the space went, not where you hope it went. Most people use du…
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Grep for Humans
You already know grep exists. You may even use it occasionally. What most people miss is that grep is not just a search tool. It is a precision instrument for answering specific questions under pressure. Logs are noisy. Directories are sprawling. Time is limited and grep is how you cut straight to what matters. This…
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Top for Humans: The Only 5 Things You Need to Look At
or How to Diagnose Linux Performance Problems in Under 60 Seconds Most people are using top all wrong. They scan everything, understand nothing, and leave more confused than when they started. You don’t need to read the whole screen. You really only need these 5: Let’s start with Load Average. At the top right of…
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🐧 The Linux Learning Path: From First Terminal Command to POWER User
Linux can be intimidating when you first start, but it doesn’t have to be! I’ve got good news for you today – whether you’re switching from Windows or just curious about open source, this guide will help you build a strong foundation and confidently begin your Linux journey. ✨ Let’s get into it – step-by-step……
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🚨The Rise of Linux Malware: Threat Trends & Hardening Strategies for 2025
Linux has long enjoyed a reputation for being more secure than other operating systems. But that narrative is shifting–fast. As Linux continues to dominate enterprise infrastructure, cloud deployments, and container environments, it’s now squarely in the crosshairs of threat actors. From ransomware campaigns to botnet infestations, malware targeting Linux systems is increasing in both volume…