#linux-administration articles

ZTZero Trust Threadszerotrustthreads.hashnode.devAug 22 · 5 min read

Linux Admins Know That Everyone Else Learns at 2 AM

Linux has a special way of teaching you. You think everything is working. Then something isn't. You stare at the terminal. You search for the error. You change one thing. Now two things are broken. We

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SJSumit Jhasumit-jha.hashnode.devAug 17 · 6 min read

How I Added Swap Memory to an Ubuntu EC2 Instance for Jenkins

Running Jenkins, Docker, and other DevOps tools on a small AWS EC2 instance can quickly consume available RAM, just like mine. When physical memory becomes limited, Linux can use swap space as additio

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RDRojarani Daasarirojadaasari.hashnode.devAug 16 · 9 min read

Linux Philosophy and Concepts: Understanding Linux from History to Distributions

Linux is everywhere today — from cloud servers and smartphones to supercomputers, embedded devices, and critical infrastructure. But before working with Linux commands and administration, it is useful

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PKPratiksha kadamlastoyster.hashnode.devFeb 12 · 6 min read

Make Linux React Instantly When a File Appears

Most automation in Linux relies on cron. And cron has one big flaw: it waits. If your job runs every minute, a user might wait 59 seconds before anything happens. That’s not instant. That’s polling. Today we’re going deeper. We’re building an event-d...

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PKPratiksha kadamlinuxlinks.hashnode.devFeb 9 · 6 min read

Rootless Containerization

Today we are tackling the single most confusing topic in modern Redhat Linux System Administration. We are going to deploy a containerized service. Sounds easy, right? podman run and you're done? Wrong. Today, you must deploy a Rootless Container tha...

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MIMohammed Insaf Nilaminsafnilam.hashnode.devSep 16, 2025 · 3 min read

🔐 Fortify Your Droplet: Unlock Free HTTPS with Let’s Encrypt SSL!

By now, your droplet is already fortified — you’ve: Created a non-root user Secured SSH access Enabled a firewall The next essential step is to encrypt all traffic with HTTPS. Without HTTPS, sensitive data (like login credentials) is vulnerable ...

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SUshafiu usmansumyelwa.hashnode.devApr 16, 2025 · 6 min read

Building a Complete Monitoring Stack with Prometheus, Alertmanager, and Grafana

Introduction Monitoring is a critical part of running reliable systems, but setting it up correctly can feel overwhelming—especially when working with multiple tools. In this hands-on lab, we walk through the complete process of building a production...

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DADarshan Atkariatkaridarshan04.hashnode.devDec 20, 2024 · 6 min read

Linux Logical Volume Management

What is LVM The Logical Volume Manager (LVM) is a powerful storage management tool in Linux that provides an abstraction layer over physical storage devices. It allows for the dynamic allocation, resizing, and management of disk space without disrupt...

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DVD V Shashidhar Reddyhakah.siteAug 6, 2024 · 8 min read

How /etc/shadow Enhances Linux Security

The /etc/shadow file in Linux plays a crucial role in system security by storing hashed passwords and related information for user accounts. Unlike the older the /etc/passwd file, which holds user account details in plain text, /etc/shadow ensures th...

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NVNikunj Vaishnavdevcloudjourney.hashnode.devJun 27, 2024 · 5 min read

Comprehensive Linux User Administration: Tips for Newbies and Experts

Introduction User administration is a fundamental aspect of managing a Linux system. Whether you're setting up a personal server or managing a fleet of machines in a corporate environment, understanding how to effectively manage users is crucial. Thi...

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Linux Admins Know That Everyone Else Learns at 2 AM

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Linux Philosophy and Concepts: Understanding Linux from History to Distributions