Write-ups

Docker concepts: file, images, and containers

I’ve been asked these questions quite a few times and I am confused about how to explain it in layman’s term, but again if you can’t explain it to a 5 yr old, you don’t understand it yourself. Dockerfile: A Dockerfile is […]

Docker 101: Basics

Docker is cool. I’ve just started to use and play it for small projects. This part will cover the basics of building and running docker containers and images. I started taking courses on Lynda.com which is given out free by […]

Linux: File Descriptors, Streams and Pipes

File Descriptor: Linux file descriptors are non-negative integers that help in identifying an open file within a process while using input/output resources like network sockets or pipes. It can be considered as an index table of open files. A kernel […]

Linux: HA-Proxy vs Varnish: What, How and Where

HA-Proxy HAProxy, or High Availability Proxy is used for load balancing. Load-balancer servers are also known as front-end servers. Generally, their purpose is to direct users to available application servers. A load-balancer server may have only the load balancer application […]

Linux: Shell Lifecycle

Before writing this, I wondered the same what goes on inside a shell lifecycle. It was explained to me in one of my system administration class but we certainly do not recollect everything in a graduate course. At work, I […]

Linux: Boot Process

The first step of the boot process is the BIOS (Basic Input Output System). 1. BIOS – Basic Input/Output System Performs system integrity checks Initializes hardware, detecting drives, USB, CD-ROMs, network cards, and any other hardware. Searches, loads, and executes […]

Linux: Load Balancing VS Load Sharing

These terms are used wrongly in so many ways that I sometimes cringe on it. More because I am confused when to relate to what. When you are a beginner you may overlook the difference Load Balancing VS Load Sharing, […]

Linux: How does DNS work?

Many people will ask you in interviews what exactly happens when you type google.com in your browser? And they want you to go in detail as possible. Or simply: How does dns work? 1. You type google.com into the address […]