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#linuxadministrator

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To the People Nobody Notices Until Something Breaks

A heartfelt tribute to DBAs, support engineers, sysadmins, and network teams whose work often goes unnoticed until something breaks.

3 min readunscriptedthoughts.hashnode.dev

Sayantan MannaApr 12

From Code to Clean Uninstall: A Practical Guide to RPM Packaging with a Java HTTP Server

Learn RPM packaging from the ground up by building, installing, upgrading, and uninstalling a Java application. This beginner-friendly guide covers RPM SPEC files, directives, macros, systemd integration, package lifecycle management, upgrades, and best practices with practical examples.

20 min readdevops-bites.hashnode.dev

Abdul GhafoorFeb 15

Today I learned some seriously practical Linux admin skills

Today, I completed the Source Code Installation module and walked through the full process of building and installing from source with more confidence.

1 min readghafoor4321.hashnode.dev

Tathagat GaikwadSep 8, 2025

🐧 How to Troubleshoot High CPU Usage in Linux: A Complete Guide

High CPU usage is one of the most common issues faced by Linux administrators, DevOps engineers, and SREs. But here’s the catch: high CPU usage isn’t always bad. Sometimes, it simply means your CPU is doing its job efficiently. Other times, it’s a si...

3 min readcloudenthusiastic.hashnode.dev

Pradnya SutarJul 14, 2025

What I Learned from Performing Real-World Service Migrations (Without Downtime)

As a Linux System Administrator, I’ve recently been learning how to migrate client websites and email services from one server to another — with zero downtime. Unlike theory-based training, working with real client data taught me how small things (li...

3 min readmigrationofdata.hashnode.dev

zia kayaniMar 11, 2025

Linux level 1 and bash scripting

In our previous article, we explored the basics of Linux, covering fundamental commands and file system navigation. Now, it’s time to take our Linux journey a step further. This article will focus on intermediate Linux commands means shift to the lev...

11 min readziakayani.hashnode.dev

charlotteFeb 22, 2025

Resolving the Matter: Configuring DNS with system

A Guide to Managing DNS on Linux with systemd-resolved

1 min readukfinpaydigest.hashnode.dev

Shubham SalunkeFeb 15, 2025

WEEK 2 Linux Hands-On

Task 1 : User & Group Management To create a user use command —> sudo useradd <user_name> To create a group use command —> sudo groupadd <group_name> To add user in a group use command —> sudo usermod -aG <group_name> <user_name> Set a password an...

1 min readfirst-week-of-90daysdevops-challenge.hashnode.dev