Tag: 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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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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🔐 41 Practical Ways to Reduce Your Personal Cybersecurity Risk
Cybersecurity isn’t about achieving perfection, it’s about minimizing the attack surface, which translates into reducing risk. Every step you take from this list makes it harder for bad actors to succeed. You don’t have to do all 41 things overnight. Even if you can implement 5–10 of these items, you will dramatically boost your personal…
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🧠Understanding the Linux File System: A Beginner-Friendly Guide
When you’re new to Linux, one of the first things that can trip you up is the file system structure. Unlike Windows, where drives like C:\ or D:\ dominate, Linux has a single unified file tree starting from a single root directory: /. Let’s walk through the Linux file system and explain what each key…