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Linux Tips

A blog by Blogger in CodeName Blogs

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Entries in this blog

LHB Linux Digest #25.29: Git for DevOps eBook, getfacl, Crontab Recovery and More

by: Abhishek Prakash Fri, 03 Oct 2025 17:22:02 +0530 The Git for DevOps course has been converted into an eBook. Considering that it is less hands-on and more theory, it makes sense to read it as book. LHB Pro members can download the ebook for free from the resources page (scroll down a bit). If you are not a Pro member yet, either opt for one and get access to everything we create or just purchase this eBook. One more chapter has been added to the systemd automation course. I plan to publis

Simulating and Detecting Malware Attacks on Linux With ClamAV

by: Hangga Aji Sayekti Mon, 29 Sep 2025 13:43:24 +0530 Linux may feel secure, but it’s not immune to malware. Servers, VPS, and even IoT devices can be targeted by malicious actors. The good news? You can detect and defend against some threats using ClamAV, an open-source antivirus engine. Now, ClamAV is not your typical antivirus, as it may throw plenty of false positives and you need to analyze if there are actual threats. In this guide, I’ll show you how to simulate malware attacks safely u

LHB Linux Digest #25.28: New Git For DevOps Course, Emacs Guide, Self-hosted Cloud Storage and More

by: Abhishek Prakash Fri, 26 Sep 2025 13:14:55 +0530 As I promised in the previous newsletter, we have published the Git for DevOps course. Unlike most of our courses, this one has more theory than hands-on. We did that deliberately, as many Git courses out there only explain commands, not the underlying concepts. And that creates a knowledge gap. Git for DevOpsGain the right knowledge. Learn the core principles of Git instead of jumping straight into git commands.Linux HandbookMead NajiThis c

Chapter 2: Git Architecture

by: Sreenath V Thu, 25 Sep 2025 14:49:24 +0530 When you build any project, the first question you need to answer is what you need as requirements, or what you want to build to solve the problem that you have. Suppose I want to rebuild Git from scratch. I will not go to the developer and say "build Git," and the developer will start coding it. Of course not. You will first sit with the developer and start explaining what problem you want to solve, or what are the things you do manually that take

Git for DevOps

by: Mead Naji Thu, 25 Sep 2025 14:33:55 +0530 As a system admin, a DevOps engineer, or even a developer, working with a version control system, or in short VCS, is not a choice. You need to master how to work with one of the available VCS tools in order to be able to collaborate and work on a team for a project. A VCS is a way to record changes to single or multiple files over time and lets you control and retrieve a specific version later when you need it. Suppose you are working on an applica

Advanced Automation with systemd

by: Umair Khurshid Wed, 24 Sep 2025 16:57:20 +0530 Unlock the full potential of your Linux system by replacing the classic cron jobs with modern, powerful systemd automation. Learn how to schedule, monitor, sandbox, and optimize automated workflows like a pro, all while leveraging the same tools used by your Linux system itself. Why systemd instead of cron? Cron has been around for decades, but it’s limited. It can’t monitor dependencies, doesn’t integrate with system logging, and has no nativ

LHB Linux Digest #25.27: zswap vs zram, subfinder, kubectl logs, systemd-inhibit and More Linux Stuff

by: Abhishek Prakash Fri, 19 Sep 2025 17:05:42 +0530 Before you see all the new tips and tutorials, allow me to share a few future updates. So, we are working on two new microcourses: Git for DevOps and Advanced Automation With Systemd. I know that we already have a systemd course in place, but this one specifically focuses on automation and can be considered an advanced topic. Other than that, we are working on Docker video tutorials. Stay tuned for the awesome Linux learning with Linux Han

Finding Subdomains with Subfinder in Linux

by: Hangga Aji Sayekti Fri, 19 Sep 2025 15:56:59 +0530 When you start exploring a target website, the first question to ask is simple: what names exist out there? Before you think about vulnerabilities or exploits, you would want a map of subdomains. That map can reveal forgotten login pages, staging servers, or even entire apps that weren’t meant to be public. My preferred tool for this first step is subfinder. It’s simple, quiet, and quick. In this guide, we’ll walk through installing subfi

Exploring Ansible Modules

by: Abhishek Prakash Sat, 13 Sep 2025 10:55:42 +0530 Ansible is a powerful automation tool that simplifies the management and configuration of systems. At the heart of Ansible's functionality are modules, which are reusable scripts designed to perform specific tasks on remote hosts. These modules allow users to automate a wide range of tasks, from installing packages to managing services, all with the aim of maintaining their systems' desired state. This article will explain what Ansible mod

LHB Linux Digest #25.26: tcpdump for cookie capture, GUI for Podman, diff command mastery and more

by: Abhishek Prakash Fri, 12 Sep 2025 17:02:47 +0530 Another week, another batch of Linux goodies! 🎉 Let me quickly summarize them for you. Spaces in filenames are still tripping people up, diff still scares beginners, and tcpdump still lets you spy on HTTP traffic like a hacker in a hoodie 🕵️‍♂️ (don’t worry, it’s for learning!). If containers are your thing, we’ve got a guide on checking Docker disk usage (before your server starts screaming for space) and some practical Ansible copy module

Use tcpdump to Monitor HTTP Traffic and Extract Sensitive Data like Password and Cookies

by: LHB Community Fri, 12 Sep 2025 10:48:27 +0530 You already know the basics of tcpdump from our guide. It helps you watch live traffic, spot misconfigurations, and check that sensitive data is handled safely. Let’s put tcpdump to some practical work. The skills you practice here also align with objectives in CompTIA Security+ or network security roles. In this hands-on tutorial, we’ll run examples against the test site http://testphp.vulnweb.com to filter GET, POST, and sensitive data. By

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