1. Mastering grep What grep does Search inside files, filter logs, extract patterns. Most important commands grep “pattern” file grep -i “pattern” file # ignore case grep -r “pattern” /path # recursive grep -v “pattern” file # exclude grep -E…
Shell Scripting Bootcamp – Full Course Shell Scripting Bootcamp(Beginner → Advanced) MODULE 1 — INTRODUCTION TO SHELL SCRIPTING Lesson 1: What Is Shell? What Is Bash? A shell is a command interpreter in Linux. Bash is the most widely used.…
A High Availability (HA) cluster ensures that your services remain online even if a server hardware failure occurs. This guide walks you through a production-ready setup using Pacemaker, Corosync, and Shared Storage. 1. Prerequisites & Environment You will need two…
When a deployment goes sideways, knowing which command to run can save you hours of frustration. This guide covers the essential commands for debugging OpenShift/Kubernetes clusters, categorized by the depth of the issue. 1. The Essentials: Initial Discovery The first…
Kubernetes Pod Status Reference In Kubernetes, pod health is tracked through a high-level Phase and more specific Container States. When you run kubectl get pods, the STATUS column provides a summary of these combined values. 1. The 5 Pod Phases…
Monitor your pods in real-time When you add -w(watch), the command stays open and waits for changes. Continuous Updates: If a pod’s status changes (e.g., from Pending to Running), a new line will automatically appear in your terminal. Bulk Operations…
The “Why” Every developer or tech enthusiast has a “local” graveyard of notes—snippets in Notion, half-finished READMEs, or physical scribbles. This blog is my attempt to move those thoughts from my local machine to the web. Tech Notes is a…