Building reliable, secure systems on Nerdsid.com

Docker networking

Tue, 07 Apr 2026 07:32:28 +0530

Docker networking is like batteries included but removable/configurable.

Port checking

docker container port <container>

Network driver

Built-in or 3rd party extensions that give you virtual network features.

Default is bridge network driver.

Networking commands

Find IP of a container

docker contianer inspect --format "{{NetworkSettings.IPAddress}}" <container id>

Show networks

docker network ls

Inspect a network

docker network inspect

Create a new network

docker network create --driver

Connect a container to a network

docker network connect [OPTIONS] NETWORK CONTAINER

Connects a container to a network. You can connect a container by name or by ID. Once connected, the container can communicate with other containers in the same network.

Brief history of Docker

Fri, 03 Apr 2026 07:32:28 +0530

The pre Docker era

Pre VM era

Businesses bought overpowered servers which operated at 5-10% of their capacity. No one wanted unhappy customers & lost revenue.

Summary: high capex, low operational efficiency.

The VM era

VMWare, Inc created Virtual machine (VM). This allowed to run multiple applications on a server thereby increasing operational efficiency of servers

Issues with VMs:

Slow to boot
Not portable
Every VM needs OS patching
Needs monitoring

What do we mean by not portable:

Containers

Fri, 03 Apr 2026 07:32:28 +0530

Important principles

There are two important principles of images:

Images are immutable. Once an image is created, it can’t be modified. You can only make a new image or add changes on top of it.
Container images are composed of layers. Each layer represents a set of file system changes that add, remove, or modify files.

Image vs container

A container is an running instance of an image.

Just like how in OOPs an object is an instance of a class. The class defines the blueprint. The object is an instance of the class.

Kubernetes DaemonSets

Mon, 17 Aug 2026 10:00:00 +0000

DaemonSet runs exactly one Pod per matching node, and it schedules onto new nodes automatically as they join the cluster. That’s why CNI plugins, log shippers and node exporters are almost always DaemonSets rather than Deployments.

Five short tasks below: three about reading an existing cluster, two about building a DaemonSet from scratch. Everything assumes the usual alias:

alias k=kubectl

Task 1: How many DaemonSets exist cluster-wide?

The trap is the default namespace scoping — you have to ask for all namespaces explicitly:

Kubernetes Resource Limits

Mon, 17 Aug 2026 09:15:00 +0000

Resource limits look trivial on a slide and then bite you at 3 AM when a container keeps restarting with exit code 137. This lab walks through five short tasks on Pod requests and limits — reading them, diagnosing a crash caused by them, and changing them on a live cluster.

Everything below assumes the usual alias:

alias k=kubectl

Task 1: Identify the CPU requirements on the `rabbit` Pod

A Pod called rabbit is running in the default namespace. The question asks for its CPU requirement — which means the request, not the limit.

Using Shell Variables to Avoid Errors

Wed, 12 Aug 2026 00:00:00 +0000

Task

Create two files (release.txt, owner.txt) under a directory release-packages/northwind-api. The goal is to avoid typos by storing the path once in a variable.

Approach

Store the repeated path in a shell variable (TARGET_DIR), then reference it for both directory creation and file writes.

Solution

file.sh

#!/bin/bash
set -euo pipefail
TARGET_DIR=release-packages/northwind-api
mkdir -p "$TARGET_DIR"
echo 'release=2026.06.09' > "$TARGET_DIR/release.txt"
echo 'owner=platform' > "$TARGET_DIR/owner.txt"

Now run the script using chmod +x file.sh, then ./file.sh.

Verification

Cat file contents

$ cat release-packages/northwind-api/release.txt 
release=2026.06.09
$ cat release-packages/northwind-api/owner.txt
owner=platform

Verification isn’t just a formality. For example, a typo in the path or quoting can fail silently (e.g. create a wrongly named file) instead of throwing an error. So always confirm output rather than trusting the script ran correctly.

Container Cpu Limit Configuration

Wed, 01 Jul 2026 13:30:50 +0000

Introduction

In this lab, you’ll limit the CPU usage of a Docker container that consumes excessive CPU resources.

Scenario

A container named cpu_test is running from the myapp:cpu image and performs CPU-intensive computations. When monitored with docker stats, the container regularly consumes 150–200% CPU, utilizing multiple CPU cores and impacting other services on the host.

Task

Recreate the container with a CPU limit of 500m CPU so that docker stats reports CPU usage consistently below 60% during validation.

Docker Compose Basic

Wed, 01 Jul 2026 11:38:29 +0000

Introduction

In this lab, you’ll first deploy an application by setting up network, multiple containers individually. Then you will clean up resources, and deploy the same application using Docker Compose.

Task 1: Create a Bridge Network

Create a bridge network named clicknet.

docker network create --driver bridge clicknet

Verify

list docker networks

$ docker network ls
NETWORK ID NAME DRIVER SCOPE
5aa54ade2dcc bridge bridge local
fc40bfcbce91 clicknet bridge local
238b23f4e2a9 host host local
59b9cbf97489 none null local

Task 2: Run a Redis Container

Create a background container named redis using the redis:alpine image and attach it to the clicknet network.

Practical Grep: Filtering Errors and Patterns in Log Files

Tue, 30 Jun 2026 11:41:54 +0000

Introduction

This walkthrough covers using grep to search and filter log files for errors, specific requests, and multi-pattern matches.

Tasks

Find all ERROR messages in system.log and count how many there are.
Find all lines containing POST requests in access.log.
Find all lines in application.log that contain both WARNING and query (case-insensitive).
Search for all user authentications (containing User authenticated) across all log files.

Requirements

Use grep for all searches (combining with other commands like wc where needed).
Save each task’s output to its own file: task1_output.txt, task2_output.txt, task3_output.txt, task4_output.txt.
Original log files must not be modified.

Solution

Task 1

grep -c "ERROR" system.log > task1_output.txt

grep -c counts the number of matching lines instead of printing them. Redirecting the output saves the count to task1_output.txt.

Docker Environment Variables and Networking

Tue, 16 Jun 2026 06:50:38 +0000

In this lab, we’ll explore:

Inspecting environment variables in running containers
Passing environment variables at runtime
Deploying MySQL containers
Creating custom Docker networks
Connecting applications and databases across containers

Task 1: Inspect Environment Variables

First, identify the value configured for the APP_COLOR environment variable in a running container.

List the running containers:

$ docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
cdf886f902d4 kodekloud/simple-webapp "python app.py" 10 minutes ago Up 10 minutes 8080/tcp mystifying_knuth

Inspect the container and look for the Env section:

Custom Resource Definition

Tue, 02 Jun 2026 05:54:03 +0000

Task 1

CRD objects can be either namespaced or cluster-scoped.

Is this statement true or false?

Answer: True

Task 2

What is a custom resource?

Answer: A custom resource is an extension of the Kubernetes API that is not necessarily available in a default Kubernetes installation.

Task 3

We have provided an incomplete Custom Resource Definition (CRD) manifest located at /root/crd.yaml. Complete the file to define a namespaced CRD named internals.datasets.kodekloud.com.

Docker Basic Commands

Mon, 01 Jun 2026 12:33:56 +0000

Task 1

What is the version of the Docker Server Engine running on the host?

Check Docker version

$ docker version

Client:
Version: 25.0.5
API version: 1.44

Server:
Engine:
Version: 25.0.5
API version: 1.44

Answer: 25.0.5

Task 2

How many containers are currently running on this host?

List running containers

$ docker ps

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

Answer: 0

Task 3

How many images are available on this host?

Deployments in Kubernetes

Wed, 06 May 2026 15:06:12 +0000

Tasks

Task 1

How many PODs exist on the system?

$ k get po
No resources found in default namespace.

Ans: 0

Task 2

How many ReplicaSets exist on the system?

$ k get rs
No resources found in default namespace.

Task 3

How many Deployments exist on the system?

$ k get deploy
No resources found in default namespace.

Task 4

How many Deployments exist on the system now?

Pods in Kubernetes

Tue, 05 May 2026 16:46:53 +0000

Task

The lab consists of a k8s master node & worker node. You have access to a terminal on the controlplane.

Task 1

How many pods exist on the system?

list pods

$ k get po
No resources found in default namespace.

Ans: 0

Task 2

Create a new pod using the nginx image.

Ans:

$ kubectl run nginx --image=nginx
pod/nginx created

The basic syntax is:

Publishing Ports in Docker

Fri, 01 May 2026 14:37:01 +0000

Task

Solution

Show solution

This is the first paragraph of detailed content. This is the second paragraph of even more detailed content.

You can also include lists
Or other markdown elements

service/networking/network-policy-default-deny-egress.yaml

---
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
 name: default-deny-ingress
spec:
 podSelector: {}
 policyTypes:
 - Ingress

ls -R /etc/
grep "name" file.txt

name = "God"
greeting = f"Hello {name}"
print(greeting)

Terminal output

Before

Links Worth Your Time

Fri, 24 Apr 2026 07:32:28 +0530

Handpicked links I’d actually send a friend. No fluff. Newest first.

2026

Jun

LLM AIs Are Tools, Not Thinkers

A lot of people are completely offloading thinking and common sense to LLMs and deriving frankly nonsensical answers without first checking, verifying, or simply using their brain to think.

May

Creating Art With The Mind | Neuralink

Neuralink - a brain-computer interface, helps to create art with mind.

Reimagining the mouse pointer with AI

Shell Form vs Exec Form

Mon, 20 Apr 2026 23:02:53 +0000

Shell form is just a string.

Exec form - JSON array syntax.

Term	What it really means
Shell form	String → runs via a shell (`/bin/sh -c`)
Exec form	JSON array → runs directly (no shell)

Shell form:

CMD node app.js

Is equivalent to:

/bin/sh -c "node app.js"

The bourn shell is default for Linux containers. Windows containers have cmd.exe as default.

People also use powershell rather than the default.

Linux Journalctl Command Cheat Sheet

Wed, 15 Apr 2026 06:39:17 +0000

I recently needed to free up disk space by removing old system logs, so I collected the command I used and other useful journalctl commands for future reference.

Disk usage & vacuum (remove old logs)

Show journal disk usage:

sudo journalctl --disk-usage

Remove archived journal files until total size is below X:

sudo journalctl --vacuum-size=500M

Remove archived journal files older than a time:

sudo journalctl --vacuum-time=3d

Remove archived journal files, keeping only the most recent N files:

Kill Any Process Using a Port in Powershell

Wed, 08 Apr 2026 05:17:46 +0000

Recently I wanted to start a server in port 8899 & I got an error telling that some other process is using it.

Here is a one-liner you can use to kill an existing process bound to a port.

Stop-Process -Id (Get-NetTCPConnection -LocalPort 8899).OwningProcess -Force

Ultimate Vi Shortcuts Cheat Sheet

Tue, 07 Apr 2026 20:43:00 +0000

Big picture of Vim commands

Normal mode (default)

 ├── Navigation (h, j, k, l, G)
 ├── Editing (d, c, x)
 ├── Insert triggers (i, a, o, O, A)

Insert mode → typing text
Visual mode → selecting text
Command mode (:) → commands like :w, :q, :10,20d

G → go to last line

2. Editing / insertion commands

o, O, A : These change the file and switch you to insert mode.

How to Fix the Apostrophe (') Key Not Working in VirtualBox Ubuntu

Tue, 07 Apr 2026 07:32:28 +0530

If you’re running Ubuntu inside Oracle VM VirtualBox and notice that pressing the apostrophe (’) or tildae (`) key doesn’t show anything until you hit space, you’re not alone.

This issue is caused by “dead keys” in keyboard layouts, where keys are designed to combine with others to create accented characters.

In this guide, I’ll show you two simple fixes to make your apostrophe key work.

Root cause

What you’re seeing is a keyboard layout / “dead key” behavior, not a VirtualBox bug.

Docker assignment 1

Mon, 06 Apr 2026 07:32:28 +0530

Question/assignment

• Run a nginx, a mysql, and a httpd (apache) server
• Run all of them –detach (or -d), name them with –name
• nginx should listen on 80:80, httpd on 8080:80, mysql on 3306:3306
• When running mysql, use the –env option (or -e) to pass in MYSQL_RANDOM_ROOT_PASSWORD=yes
• Use docker container logs on mysql to find the random password it created on startup
• Clean it all up with docker container stop and docker container rm (both can accept multiple names or ID’s)
• Use docker container ls to ensure everything is correct before and after cleanup

Linux Commands Cheat Sheet (Most Used Commands)

Fri, 03 Apr 2026 07:32:28 +0530

Disk Usage / File Analysis
AWS S3 commands

Disk Usage / File Analysis

Find out space taken by files older than 5 days

find . -type f -mtime +5 -print0 | du --files0-from=- -ch | grep total

Keep last 100d fies

ls -t | sed -e '1,100d' | xargs -d '\n' rm -f --

truncate -s 50M catalina.out

ls -d */

Find out Year month of files

stat -c '%y' * | awk '{print $1}' | xargs -I{} date -d {} "+%b %Y" | sort -u

List all files other than `.gz`

If you want this to do recursively:

Docker failed to resolve

Tue, 31 Mar 2026 05:27:57 +0000

I recently enountered this error.

Grep Failing on Hyphen Patterns? Try This Fix

Fri, 05 Dec 2025 18:48:38 +0530

Today I was searching for --debug in a log file.

So, I ran grep "--debug" file.log.

To my utter surprise, instead of seeing a match, I got this error:

grep output

grep: unrecognized option '--debug'
Usage: grep [OPTION]... PATTERNS [FILE]...

I didn’t expect to see any error because I had quoted the pattern ("--debug").

After few minutes of searching, I found the fix:

grep -- --debug file.log

This is where the humble double hyphen -- steps in.

Style Guide

Fri, 05 Dec 2025 11:17:11 +0530

This page serves as a quick visual reference showcasing all elements on this website.

H1 Heading

H2 Heading

H3 Heading

H4 Heading

H5 Heading

H6 Heading

Paragraphs

This is a regular paragraph of text. You can write multiple sentences to show flow and readability.

Line Breaks

Line one.
Line two (break created with two spaces at end of previous line).

Emphasis

Italic text

Bold text

Bold and italic text

~~Strikethrough~~

11 Essential OpenSSH Components

Sat, 29 Nov 2025 20:05:20 +0530

You might have SSHed into servers hundreds of times.

You might have used ssh-add to load keys into your agent.

You might have used scp to copy files back and forth between your machine and server.

But have you ever paused and looked at the bigger picture?

All these commands come from one place — the OpenSSH suite. It’s much more than just ssh and scp.

OpenSSH components

OpenSSH has 11 major components.

7 Skills I Wish Were Taught in School

Sat, 15 Nov 2025 07:32:28 +0530

Written by Jade Bonacolta

1. Sales (without being salesy)

How to listen for real problems, not just pitch
How to handle objections with confidence
How to build trust before asking for the sale

Recommended reading: To Sell Is Human — Daniel Pink

2. Difficult conversations

How to say no to clients without burning bridges
How to negotiate contracts that protect you
How to give feedback to new hires who aren’t performing

Recommended reading: Crucial Conversations — Kerry Patterson

Career tips

Sat, 15 Nov 2025 07:32:28 +0530

9 Soft Skills to Accelerate Your Career

1. Make People Feel Important (SHR Method)

Your formula to be charismatic:

Seen

Give eye contact
Offer a specific compliment

Heard

Ask good questions
Be interested, not interesting

Remembered

Follow up
Remember names
Recall something you discussed

Written by Ben Meer

2. Hone Your Body Language (7-38-55 Rule)

People will like/dislike your communication based on:

7% words
38% tonality and face
55% body language

Stand up straight, pull your shoulders back, make eye contact, smile, give a firm handshake… You will be dangerous.

Favourite English lines/phrases

Sat, 15 Nov 2025 07:32:28 +0530

I don’t want to go all the way back to the Big Bang, but I’m going to go back …
He said that … I’m paraphrasing it bcoz I don’t remember the exact lines.
This is not intended to be a deep technical … on any of the topics mentioned - rather just enough material to wrap your mind around the progress that has been made over time and how we’ve ended up where we are today.
This is AWSome Santhosh NC 👏 Thanks a lot for your AWSome wishes 😍
That’s a clear example of the cobbler’s children going barefoot.
Designing tech that works for people. Not the other way around.
Fit the traditional mold.
I know this might sound like far fetched.
I’ve spent the last few years doing so many different things - excelling at some, failing at others.
By way of due diligence as an intermediary we also take this opportunity to remind our users to comply with the Indian Information Technology (Intermediary Guidelines and Digital Media Ethics Code) Rules, 2021 (as amended).
Please adhere to these terms to maintain continued use of and access to YouTube. Violation of these terms and guidelines may result in warnings or further action including loss of access or termination of all or part of your account.
Artists by their very nature are more sensitive than the average bear – which is why we flourish in artistic fields. We FEEL things much deeper; We laugh louder, cry harder … and bitch the loudest – particularly when someone takes a dig at our music.
Widespread acclaim
But what about the process of application development? Does Kubernetes bring anything to their table? It definitely does.
It’s not as bad as it sounds. The benefits usually outweigh the disadvantages.
It’s difficult to provide an exact number when the scales tip over, since other factors also influence the decision.
Share with you the learnings that I’ve had. I’ve not had so much fun…
Sometimes in science a lot of your experiments don’t work, but this prize says that what I am doing is important and gives me a new injection of motivation. - Urbashi Sinha on receiving Gates CAmbridge scholarship.
This book will help you better diagnose latency problems and master the low-latency techniques that have been predominantly “tribal knowledge” until now. You’ll learn a holistic approach, with techniques that intersect many areas of software engineering, distributed systems, databases, and operating systems.
What did you see in the pipelines that perhaps others didn’t?
You are one of the wealthiest people in America, but you keep a fairly low profile. I know that you are a known entity in Houston, but outside of Houston there may not be a lot of people who know who Rich Kinder is. Is that by design?
I’m wondering what led you to leave these corporate jobs, these safe and steady corporate jobs, and decide to become owner-operators. It’s a pretty big leap. We had really successful long-standing careers in the corporate world. I was in finance, Dana was in marketing. Entrepreneurship was always a really big goal of ours.
Does that idea feel true to your life experience right now?
Concentration - a skill that is becoming increasingly important in an environment of constant stimuli.
In the Kubernetes community, the terms “resource” and “object” are used interchangeably, but there are subtle differences that warrant an explanation.
Engineers who deploy applications into the cluster therefore influence the configuration by manipulating these objects.
The fields are listed alphabetically instead of being organized into coherent groups.
As for the rest, you’ll just have to accept this unfortunate aspect of dealing with Kubernetes manifests.
The relentless dedication of the Netdata team has birthed significant advancements across all facets of our platform. The extensive rework of the dbengine, our time-series database, stands testament to this progress, ensuring enhanced performance and resilience. As we further innovated, the introduction of advanced ML capabilities, the use of more sophisticated compression algorithms, a revamped SSL layer, and a notably reduced memory footprint have added to Netdata’s prowess. Our commitment to the community shines through in our new UI, equipped with innovative features that simplify monitoring and boost its clarity.

Netdata’s open-source nature isn’t just a technical classification; it’s a philosophy. We view our software as a gift to the global community, underscoring our commitment to democratizing advanced monitoring solutions.

Links to spcl articles

Sat, 15 Nov 2025 07:32:28 +0530

Systems Aren’t Predictable - 3 Lessons From a DR activity

Fri, 14 Nov 2025 23:43:47 +0530

Lessons from a DR activity that didn’t go as planned

What is a Disaster Recovery (DR) activity?

A DR activity is a planned exercise, where you intentionally flip your workloads to a secondary setup. It may be a new region, a new cluster, or a new infrastructure environment.

The goal is to ensure that everything works the way it should when your primary environment is unavailable.

Lessons from DR activity

This week, we ran a DR activity. Everything looked perfect on paper.

A Podcast That’s Changing the Way I Think (and Grow)

Sat, 08 Nov 2025 11:31:47 +0000

I came across this amazing self-improvement podcast episode recently. If you’re into personal growth, mindset shifts, or just want something inspiring to listen to on your commute, this one’s worth checking out.

🎧 Give it a listen here:

Self-confidence vs. Self-belief (why you need both)

Why git add Wildcard Won’t Stage Your Nested Files (And How to Fix It)

Sun, 26 Oct 2025 14:54:48 +0530

I recently ran into an issue while working with Git. I had a bunch of Markdown files spread across multiple nested folders and wanted to stage them all at once. So I ran:

git add *.md

But only the .md files in the current directory got added (to the staging area). The .md files in the nested directories didn’t get added.

The root casue: the * wildcard isn’t processed by Git, but by the shell. So the shell was only matching them in the current folder. What a revelation!

Authoring

Thu, 23 Oct 2025 07:32:28 +0530

rewrite this using the terminal shortcode with appropriate titles, wherever existing yaml is given, highlight the lines that have been chnaged, format the question and answers appropriately in md.

10 Steps to Secure a New Linux VM

Wed, 22 Oct 2025 07:09:42 +0000

When you launch a new Linux VM, the level of security you really need depends on your use case. That said, there are some basic steps you can take right after provisioning a new VM, to improve it’s baseline security. Following these steps won’t make your server invincible, but it will make it safe and reduce exposure to common attacks.

1. Update your system

Newly deployed images can contain outdated packages with known vulnerabilities. Start by updating everything:

4 Ways to Watch Logs Live in Linux

Wed, 15 Oct 2025 12:49:55 +0530

1. `tail -f`

Use when:

You want to quickly stream a log file.
You want to perform short, one-off checks on a single log file.

Availibility: available on all Linux/Unix systems.

Example:

tail -f /var/log/syslog

2. `tail -F`

Some services (like Nginx, Apache) rotate logs i.e. they stop writing logs to an old file and instead write to a new file (named sequentially). tail -f stops following when that happens, but tail -F automatically switches to the new file. In other words, it handles log rotation gracefully.

The Hard Truth About Courage & Compassion

Sun, 21 Sep 2025 00:31:47 +0000

Courage, compassion they sound inspiring, even easy, when we talk about them. But living them? That’s uncomfortable, and often scary. Courage means risking judgment. Compassion means saying no.

The following excerpt from the book The gifts of imperfection dives into that raw, real side of these values.

“Courage sounds great, but we need to talk about how it requires vulnerability and the willingness to let go of what other people think, and for most of us, that’s scary.

Use Social Media Like a Gym, Not a Couch

Fri, 29 Aug 2025 11:35:47 +0000

Social media builds you or breaks you. It can be like gym or a couch - depending on your usage, feed. Watch the following video by Dr. Julie (a renowned clinical psychologist & author) to know more.

Key takeaways

Let’s be real: every time you open social media, it’s difficult to stop comparing yourself.

You compare because you’re human. It’s hardwired. If you never checked where you stand next to others in skills, values, effort — you’d be a terrible community member.

Life is a DIY project

Sun, 03 Aug 2025 11:35:47 +0000

Of late, I’ve understood that life is a DIY (Do It Yourself) project. The sooner you realise this, the better it is. The following excerpt from Sahil Bloom’s blog ¹ reinforced my belief in the same:

“You’re going to fail.
It’s going to hurt.
You’ll feel lost.
You’ll feel confused.
You’ll feel betrayed.

Complaining, blaming, pointing fingers—none of it will get you anywhere worth going.

You are in control.
Of everything.
It’s all on you.
Nobody is coming to save you.

Grep Was Built in a Day - No Jira No Sprints

Thu, 10 Jul 2025 11:35:47 +0000

I recently learnt that Ken Thompson developed the Linux grep utility in just one day. One single day! And ever since, I’ve been sitting and wondering… how?

For the uninitiated:

Ken Thompson is a pioneer of computer science who designed and implemented Unix, B, C, and Plan 9 operating systems. He also invented regular expressions, UTF-8, and Go, and won the Turing Award in 1983.
Writing a program like grep is no ordinary feat. It’s implementation is complex due to the intricacies of regular expressions, performance optimizations, and file handling capabilities.

How did Ken Thompson pull off the unthinkable? That too without Jira tickets, story points, or a bi-weekly sprint review?

The Real Beauty, The Real Fragrance

Wed, 16 Apr 2025 11:35:47 +0000

We live in a world where beauty is often associated with appearances (face, body, skin etc.). Similarly, fragnance is associated with perfumes, deodrants etc.

In this blog post, I would like to offer a different perspective to these existing beliefs. I want to take you beyond the surface definition and offer a humane perspective on what I believe real beauty and real fragrance truly are. Feel free to disagree with me, if you wish.

Differnece Between X Window System and a Desktop Environment

Tue, 14 Jan 2025 11:31:46 +0000

The X Window System and a desktop environment are related but serve different purposes in a graphical user interface (GUI) on Linux.

X Window System (X11): It is the foundational framework that provides the basic functionality for displaying graphical applications. X manages windows, handles input devices (like the mouse and keyboard), and allows graphical applications to display their content. However, X alone does not provide a full, user-friendly interface; it merely acts as the underlying protocol for graphical communication.

Understanding Bootloader With a Toy Robot Example

Tue, 14 Jan 2025 10:47:04 +0000

Imagine you have a toy robot that needs to be turned on before it can start moving and talking. When you press the power button, the robot goes through a quick check to make sure its batteries are working, its wheels can spin, and its voice box is ready. It makes sure all components are connected and are in a working state.

This initial check is like a bootloader. The bootloader performs similar checks on your computer or device. It ensures the system’s hardware (like memory, storage, and CPU) is functioning correctly before anything else happens.

Understanding the Kernel and Distribution With a Restaurant Example

Tue, 14 Jan 2025 09:28:28 +0000

Let’s use the example of a restaurant to illustrate the concepts of a kernel and a distribution.

Kernel: The Chef

Think of the kernel as the head chef in a restaurant. The chef is responsible for managing the kitchen, ensuring that all the ingredients are prepared correctly, and that the cooking processes are followed. The chef makes sure that everything runs smoothly in the kitchen, coordinating the cooking of different dishes and managing the kitchen staff. Without the chef, the kitchen would be chaotic, and the food wouldn’t be prepared properly.

Key Linux Terms Explained: Kernel, Bootloader, Filesystem & More

Tue, 14 Jan 2025 08:26:23 +0000

Before you begin to use Linux, you need to be aware of certain terms like: Kernel, Bootlader, Window system, service etc.

Kernel

Kernel is the glue between hardware and applications. It controls hardware and allows applications to make use of the hardware.

Examples: Linux kernel

Distribution

A Linux distribution (or distro) is essentially the same as an operating system (OS) in the context of Linux.

Linux distro includes not only the Linux kernel (the core part of the OS) but also additional software, tools, libraries, and user interfaces that together form a complete, functional system.

How to Clone a Git Repository Along With Its Submodules

Wed, 01 Jan 2025 05:20:44 +0000

When you clone a Git repository with submodule(s) in it, by default you get the directories that contain submodule(s), but none of the files within them.

Clone with Submodules in One Command

If you pass --recurse-submodules option to the git clone command, it automatically initializes and updates all submodules in the repository, including nested ones if they exist.

git clone --recurse-submodules <repository_url>

For example:

git clone --recurse-submodules https://github.com/example/repo.git

Another Way to Initialize and Update Submodules

If you’ve already cloned a repository but forgot to use --recurse-submodules, you can run git submodule update --init to initialize and update the submodules. To make sure all submodules, including nested ones, are initialized, fetched, and checked out, use git submodule update --init --recursive.

Do you want to be happy?

Fri, 27 Dec 2024 03:35:47 +0000

So, you want to be happy? Who does not?

I think I have understood (to some extent at least) what constitutes happiness & what doesn’t.

I have realized that happiness is a state of being. Most importantly, it’s a choice that you have to make. You might have come across people who always have a smile on their face. It doesn’t mean that they have no problems in life. It simply means that they have chosen to be happy in spite of the ups and downs of life that they are going through.

Meet Qubits: The Tiny Tots Powering Mighty Computing

Thu, 26 Dec 2024 07:08:42 +0000

Unless you’ve been living under a rock, you’ve likely heard of quantum computing — the groundbreaking technology set to redefine our species’ computational prowess. It has the potential to dwarf even the fastest supercomputer operating today. At the heart of this technology lies the humble qubit.

A bit (here onwards referred to as classical bit) refers to the fundamental unit of information in a computing device. It’s quantum counterpart is known as quantum bit (qubit).

Handling failure in your 20s

Wed, 25 Dec 2024 11:35:47 +0000

While you are in your 20s, there are so many times you may feel that you have failed at something or something didn’t work out as you expected it to. In these times, it can be easy to feel like it’s the end of the world. This can also bring in additional feelings like:

You aren’t good enough.
You are good for nothing.
Nothing else you try will work out.
You should give up altogether and stick to what you know.

This mindset can make it difficult to bounce back whenever things don’t go as planned. Often you might be paralyzed by the fear of:

Facing Fear with Courage: a Lesson from Vivekananda

Sat, 14 Dec 2024 11:24:24 +0000

In this post, I share a powerful lesson from Swami Vivekananda on overcoming fear and adversity. It illustrates how facing challenges head-on, rather than running from them, leads to true freedom and growth. The incident took place when he was in Varanasi (a sacred city on the banks of the Ganges, known for its spiritual significance).

“Once when I was in Varanasi, I was passing through a place where there was a large tank of water on one side and a high wall on the other. It was in the grounds where there were many monkeys. The monkeys of Varanasi are huge brutes and are sometimes surly.

Git terms explained in simple words

Wed, 11 Dec 2024 07:32:28 +0530

Branches

Branches are copies of the main project where you can make changes without affecting the production project until you’re ready to integrate the changes. They allow developers to work on new features, bug fixes, or experiment in isolation. When the changes are complete and reviewed, you merge the branch back into the main project.

Examples:

Feature branches: Used for developing new features. For example, if you’re adding a login page to a website, you would create a feature branch like feature/login-page to make all the necessary changes.
Bugfix branches: Created to fix specific bugs. For instance, if there’s an issue with the checkout process, a branch like bugfix/checkout-error could be used.
Release branches: Prepared when you’re close to releasing a version of the project. A release branch might be named release/v1.0 to finalize new features before they go live.
Hotfix branches: These are for urgent fixes that need to be addressed in production immediately. An example could be hotfix/critical-bug to address a security vulnerability found after release.

Commit

A commit is a snapshot of the changes made to files in a branch. It records the specific modifications made at a particular point in time, so that developers can track the history of changes and revert to previous versions if necessary. A commit typically includes a message describing what was changed.

When Technology Moves Faster Than the Law

Mon, 09 Dec 2024 11:35:47 +0000

In this case, Biesk’s son had seemingly performed what is known as a soft rug pull, whereby somebody creates a new crypto token, promotes it online, then sells off their entire holdings either swiftly or over time, sinking its price. These maneuvers occupy something of a legal gray area, lawyers say, but are roundly condemned in the cryptosphere as ethically dubious at the least. ¹

The rise of cryptocurrency has introduced groundbreaking opportunities, but it has also posed significant challenges, particularly in the realm of regulation.

Protect Your Email: Share It Safely on Websites With ROT47 Encryption

Fri, 06 Dec 2024 08:28:20 +0000

So, you want to share your email on your website, but you’re worried about spam?

Sharing your email address in plaintext (without any encryption) can be risky. When you post your email openly on a website or blog, it becomes visible to web crawlers and spambots. These bots scour the internet, collecting email addresses to send spam and unwanted marketing emails. Over time, this can lead to your inbox being flooded with irrelevant messages.

The Forbidden Fruit of Apple's Walled Garden

Fri, 06 Dec 2024 07:32:28 +0530

The Forbidden Fruit of Apple’s Walled Garden

“But that’s my fault for taking a bite of the forbidden fruit inside of Apple’s walled garden.”

These words from a fellow developer really stuck with me. They perfectly capture the feeling many of us experience when we dive into Apple’s ecosystem. On the surface, it’s easy to get caught up in the sleek design, the smooth integration, and the overall polished experience that Apple offers. But for developers, there’s always a trade-off. What seems like a perfect, closed system can quickly start to feel like a cage—one where freedom, flexibility, and customization come with a cost.

Glossary of terms for Quantum computing

Thu, 05 Dec 2024 07:32:28 +0530

Superposition

Thu, 05 Dec 2024 07:32:28 +0530

Superposition is a principle where something can exist in multiple states at the same time until it is observed or measured.

Favourite quotes

Wed, 04 Dec 2024 07:32:28 +0530

Welcome! Here you’ll find inspiring quotes to motivate and guide you. Browse by topics like writing, success, and more to find some inspirational words for your day.

Tech for good

The ultimate goal should be to improve the quality of human life through digital innovation. - Pony Ma Huateng

Life

If you want something in your life that you’ve never had, you will have to do something, you’ve never done. - JD Houston

Update Git Submodule to the Latest Commit

Thu, 26 Sep 2024 15:39:06 +0530

When working with Git submodules, it’s common to update them to incorporate changes from their upstream repositories. To do this you can run the following command:

git submodule update --remote --merge

This process, in Git’s parlance, is known as updating and merging submodules. It ensures that your submodules are synchronized with the latest changes from their upstream repositories.

Important

After updating and merging the submodule, don’t forget to commit the change in your main repository. This ensures the new submodule state is recorded and shared with others working on the project. Here’s how to do that:

How to Set Git Username and Email Using Environment Variables

Wed, 11 Sep 2024 15:39:06 +0530

Introduction

Git associates a username and email with every commit. The username and email are retrieved from Git’s configuration, which can be set globally (for all repositories) or locally (for a specific repository). For example to set the username globally, you can run the command git config --global user.name "Your Name".

However, an alternative way to achieve this is by using environment variables. This can be useful for several reasons, such as:

Delayed gratification & success

Thu, 15 Aug 2024 11:35:47 +0000

Success depends on numerous factors. I believe one of them is delayed gratification. Unfortunately, we are living in an age where instant gratification is easily accessible. The mobile phone and internet promote instant gratification.

Your success depends on your ability to postpone immediate rewards (delayed gratification).

What is upsert ?

Sun, 29 Oct 2023 19:36:22 +0530

Today I came across a new word ‘upsert’. Here is what it means.

The term upsert is a portmanteau – a combination of the words “update” and “insert.” In the context of relational databases, an upsert is a database operation that will update an existing row if a specified value already exists in a table, and insert a new row if the specified value doesn’t already exist.

References

Committing to Better Technical Writing

Thu, 26 Oct 2023 19:36:22 +0530

Today, I stumbled upon DigitalOcean’s Technical Writing Guidelines. Some of their guidelines really struck a chord with me, reminding me of the importance of clear, concise writing.

I’ll be honest, I might not have followed all these guidelines in the past. But from now on, I’ve decided to keep a close eye on these. When I write new posts, I’ll make a conscious effort to incorporate these guidelines. I have listed them below.

Figuring Out Life, Career

Wed, 25 Oct 2023 07:32:28 +0530

Today, I came across a post that talked about how interets & career can change over time. The post mentions something interesting - they found out more about what they didn’t like from their old jobs than what they really wanted to do. So, by eliminating what they didn’t like, they found what they love.

This post made me think about how I should be open to change, look for what I’m truly passionate about, and keep improving myself on the journey of life.

Keyboard testing website

Tue, 24 Oct 2023 07:32:28 +0530

Exploring keyboard testing

Today, I purchased a brand-new keyboard and set out to find a suitable online platform for testing it. The keyborad has a full size layout (comes with 104 keys). After trying out several websites, I stumbled upon a noteworthy website:

https://www.keyboardtest.org

I like this website for a couple of reasons:

It accommodates full-size keyboards.
It distinguishes between the right and left Ctrl and Alt keys, an essential feature for a thorough evaluation.

Another useful website:

A Heartwarming GitHub Discovery

Mon, 23 Oct 2023 07:32:28 +0530

Today, while exploring GitHub, I stumbled upon a touching comment on the Atom Text Editor repository. It said:

Seriously, to any devs that lovingly worked on this project thank you! Every single one of the contributors to this project, you are appreciated.

Every single one of the contributors to this project, you are appreciated.

Even if things didn’t go out as we may have hoped, this editor has made a mark on the landscape of text editors, and from every +1|-1 contributor to the top, you are appreciated and did fantastic work.

About

Mon, 23 Oct 2023 07:32:28 +0530

Tech nerd is the word I’d pick for myself.

I’ve been one for as long as I can remember. I just want to know how things work, and I’ve never been able to stop.

It’s why friends, neighbours, and teachers ended up calling me when their laptop was slow or the phone had some issue.

Now I work in DevOps, which is more or less the same job with better tooling.

Contact

Mon, 23 Oct 2023 07:32:28 +0530

You can get in touch with me on Fosstodon here: fosstodon.org/@sidh. To follow me you’ve to use @sidh@fosstodon.org.

Fosstodon is a decentralized social media powered by Mastodon. You can also contact me using my e-mail:

Shortcuts to Navigate in a Terminal

Wed, 13 Sep 2023 16:51:56 +0530

Like in any other text based program, linux terminals also support usage of arrow keys, backspace to navigate and edit text. But there are some shortcuts which can replace multiple use of arrow keys and simplify user experience. Following table lists some shortcuts.

Shortcut	Action
Ctrl+A	Jump to the beginning of the command line.
Ctrl+E	Jump to the end of the command line.
Ctrl+U	Clear from the cursor to the beginning of the command line.
Ctrl+K	Clear from the cursor to the end of the command line.
Ctrl+LeftArrow	Jump to the beginning of the previous word on the command line.
Ctrl+RightArrow	Jump to the end of the next word on the command line.
Ctrl+R	Search the history list of commands for a pattern.

More such shortcuts can be found in the bash man page.

Edit Last Commit Message in Git

Wed, 13 Sep 2023 15:39:06 +0530

Introduction

Picture this: you’re on a coding spree, rushing to fulfill a project deadline. You’ve just committed your changes to Git. All of a sudden, you notice a typo in your last commit message! But don’t worry, you have the ability to correct it in the realm of Git.

Modify the last commit message

To update the last commit message in Git, you can use the --amend option with the git commit command. The following command illustrates it.

Managing Multiple Python Installations on Windows

Mon, 05 Jun 2023 07:32:28 +0530

Introduction

Managing multiple Python installations on Windows can be a challenging task. With the help of pyenv, it becomes much easier and efficient. In this article, we will explore how to set up and use pyenv to effectively manage multiple Python versions on your Windows system.

Why have multiple Python installations?

Here is a non-exhaustive list of reasons why you might want to have multiple Python installations on your system:

Chocolatey - List Installed Packages

Thu, 01 Jun 2023 07:32:28 +0530

Introduction

Chocolatey is a package manager for Windows. It is a command-line tool that allows you to install, upgrade, and uninstall software packages on your system. I have been using Chocolatey for a while now, and I find it to be a great tool for managing software packages on Windows.

List Installed Packages

If you wish to list all the Chocolatey packages installed on your system, you can use the following command:

How to Fix Common Git Mistakes

Wed, 03 May 2023 05:27:57 +0000

Git is a version control system that allows developers to manage and track changes to their codebase over time. It is easy to make mistakes, while working with Git. This can result in confusion, lost effort, and even data loss. In this post, we’ll go over some common Git problems and their solutions. Whether you’re new to Git or want to enhance your Git skills, these tips will help you become a more efficient and productive developer.

Demystifying PowerShell Versions and Editions

Sun, 30 Apr 2023 05:27:57 +0000

What does the name PowerShell refer to?

PowerShell is a command-line shell and scripting language that is built on top of the .NET Framework. It can be used to automate tasks, deal with structured data (e.g. JSON, CSV, XML, etc.), interact with REST APIs, and more.

Powershell is available in two editions: Desktop and Core. The Desktop edition is available on Windows 7/8/10/11, Windows Server 2019/2022, and in later versions of Windows. The Core edition is cross-platform and is available on Windows, macOS, and Linux. ¹

Command to Get a Count of Python Dependencies

Sat, 22 Apr 2023 00:00:00 +0530

From the root of your project run:

pip freeze --all | wc -l

This will return a number which indicates the total no. of dependencies of your Python project.

One Line Command to Create an SSH Key

Thu, 30 Mar 2023 00:00:00 -0800

Of late, I have been creating a lot of SSH keys. I am tired of answering each question that one gets asked during such a process. So, I thought of looking up all the switches (options) for the ssh-keygen command so that I can specify everything at once.

Here is the command:

For bash:

ssh-keygen -t ed25519 -b 4096 -C "Gitlab" -N "" -f ~/.ssh/gitlab

For powershell:

ssh-keygen -t ed25519 -b 4096 -C "you@mail.com for Gitlab" -N '""' -f "C:\Users\uname\.ssh\keyname"

Description

The above command generates an SSH key pair using the ed25519 algorithm with a 4096-bit key length, and saves the private and public keys with the specified name (and location).

View Files Changed in Git Commits

Thu, 16 Mar 2023 00:00:00 +0530

Introduction

I recently got into a situation, where changes made to a file was committed, but I was not sure which commit captured those changes. So, I wanted to know the files changed in past commits. One of the easiest way to do this is to simply check the history of your repo on GitHub or GitLab etc. But I didn’t push my local commits, since I wanted to ensure that things are perfect before I push. I found the following commands to be useful in this regard.

Setup SSH Authentication for Git on Windows

Mon, 13 Mar 2023 00:00:00 -0800

SSH auth vs password based auth

SSH authentication is generally preferred over password-based authentication for several reasons:

Security: Passwords are easily guessed or hacked, whereas SSH authentication relies on cryptographic keys, which are much more difficult to crack.
Convenience: Once you’ve configured SSH authentication, logging in to a remote system becomes much easier. You don’t need to remember or type in a password every time you log in; instead, you just need to have your SSH key handy.

How to Uninstall the NuGet Package Provider: PowerShell Guide

Mon, 20 Feb 2023 08:01:00 +0000

Introduction

I happened to install the NuGet Package Provider on my Windows 10 machine. I was prompted to install it when I tried to install the Tree module (using the Install-Module cmdlet). But later I realised that I didn’t need the Tree module. So I wanted to uninstall it. I couldn’t find any documentation on how to uninstall it. So I decided to write this article to help others who might be facing the same problem.

How to Fix SSH Error: Could not open a connection to your authentication agent

Sat, 07 Jan 2023 07:32:28 +0530

The problem

Recently, I was trying to add a SSH key to the ssh-agent. So, I ran the following command:

ssh-add ~/.ssh/<key_name>

This resulted in the following error:

Could not open a connection to your authentication agent.

The solution

The error message is pretty clear. Since a connection to the ssh-agent could not be opened, first let’s check if the ssh-agent is running or not.

ps -e | grep [s]sh-agent

If the ssh-agent is not running, you will not see any output. This is exactly what happened in my case. So, the solution is simple: you need to start the ssh-agent.

3 Ways to Disable Search Engine Indexing for Your Netlify Website

Fri, 30 Dec 2022 23:33:25 +0530

If you have a website hosted on Netlify, you may want to disable search engine indexing for various reasons. For example, if you are starting to design your website, you may not want Google to index your unfinished website.

There are 3 ways to disable search engine indexing for a Netlify site. Let’s discuss them one by one.

Using meta tags
Using robots.txt
Using headers.

If you are wondering which method to use, don’t worry since we will discuss the pros and cons of these methods.

The Role of init.py File in Python

Fri, 25 Nov 2022 00:00:00 +0530

If you are a Python developer, chances are high that you may have come across the __init__.py file. It has several roles in a Python project.

To show that a directory is a Python package. This allows importing modules contained in that directory as top-level modules.
To define variables and functions that should be available when the package is imported.
To specify any initialization code that should be run when the package is imported.
Organize code and make it easier to import modules

Let’s see all these use cases in detail now.

How to Exclude Files When Using git add

Tue, 22 Nov 2022 23:33:25 +0530

Problem

Sometimes you want to add all files to git except some files or folders.

Solution

You can use the :(exclude) syntax to exclude files or folders from the git add command. The :(exclude) pathspec modifier is a special syntax that allows you to exclude files or folders. A pathspec is a way to specify files in Git. It is a string that describes a set of files. You can use wildcards to match multiple files. For example, *.html matches all html files. **/*.html matches all html files in all subfolders.

Detecting OS and Platform Using Python

Fri, 28 Oct 2022 23:33:25 +0530

There are some circumstances where developing platform-specific code is simply unavoidable, either because a high-level library is not available or because the actions that must be taken are fundamentally different.

In this situation, it is essential to detect the platform.

There are a few ways of doing this in Python, including os.system() and sys.platform, but the platform module contains the best set of functionality for determining the OS details most useful in making decisions.

How to Delete Git Local and Remote Tags

Fri, 28 Oct 2022 07:32:28 +0530

You can safely delete a git tag if you created one unintentionally.

Delete git tag from local repository

Use the git tag command with the “-d” option to remove a tag from the local repository.

git tag -d <tag_name>

Let’s say you want to delete tag v1.2.3, then the following command can be used.

git tag -d v1.2.3

After executing this command, you should see a similar output as below.

Equivalent of Linux Commands in Powershell

Wed, 26 Oct 2022 17:54:30 +0530

Being an avid linux user, I am used to the linux commands. But I often work on a windows machine, which is when I look for powershell equivalent of linux commands.

I created this post to keep a track of the commands that I use often.

Well-known linux commands and their powershell equivalents

The PowerShell commands for working with the file system are same as that of linux ones. You navigate around the file system with the cd (alias for Set-Location) command.

Powershell - Get Hashes of All Files in a Directory

Tue, 25 Oct 2022 00:00:00 +0530

Code

param (
 $folders = @("D:\hash\") #case sensitive
)

$allFiles = foreach($folder in $folders) {
 Get-Childitem -path $folder -recurse |
 Select-Object FullName,Name,Length | 
 ForEach-Object {

 $hash_SHA384 = Get-FileHash -Algorithm SHA384 $_.FullName # compute sha384 hash
 $hash_SHA256 = Get-FileHash -Algorithm SHA256 $_.FullName # compute sha256 hash
 $hash_MD5 = Get-FileHash -Algorithm MD5 $_.FullName # compute md5 hash
 add-member -InputObject $_ -NotePropertyName SHA384 -NotePropertyValue $hash_SHA384.Hash
 add-member -InputObject $_ -NotePropertyName SHA256 -NotePropertyValue $hash_SHA256.Hash
 add-member -InputObject $_ -NotePropertyName MD5 -NotePropertyValue $hash_MD5.Hash
 add-member -InputObject $_ -NotePropertyName File -NotePropertyValue $_.FullName.Replace($folder, '') -PassThru 
 
 }
}

Description in 3 lines

The above code does the following:

For each folder in the variable $folders, get all files and folders in that folder and its subfolders.
For each file, compute its SHA384, SHA256 and MD5 hashes.
Output the results to a file called process.txt

Description in 10 lines

Here is a short explanation for the above code:

How to Edit Multiple Git Commit Messages

Fri, 16 Sep 2022 00:00:00 +0530

Introduction

I recently got into a situation, where I had to edit multiple git commit messages. I was contributing to a project and had already added my commits. But, I had to change the commit messages to follow the project’s commit message guidelines.

Using git rebase to edit commit history

git rebase is a powerful command that can be used to edit commit history. It can be used to edit commit messages, squash commits, reorder commits, and much more.

How to undo a Git Commit in Your Local and Remote Repository

Tue, 13 Sep 2022 17:54:30 +0530

Introduction

It is very common to make mistakes while working on a project. Sometimes, you may have made a commit with the wrong changes. In such cases, you may want to undo the commit and make a new commit with the correct changes. In this post, we will see how to undo a commit in your local and remote repositories.

Undo a commit in your local repository

The word ‘undo’ here means that:

Demystifying DKIM Records: How They Safeguard Your Email Communications

Thu, 01 Sep 2022 05:27:57 +0000

Introduction

Email has become a crucial way of communication in today’s digital world. However, it’s also a target for scammers and impersonators. Thus it is essential to have methods to verify that the messages we receive are genuine and have not been tampered with. That’s where DKIM (DomainKeys Identified Mail) records come into play. In this article, we will understand how DKIM records assist in safeguarding emails against tampering.

What is DKIM?

DKIM is an email security standard designed to make sure that an email that claims to have come from a specific domain was indeed authorized by the owner of that domain.

Angular

Mon, 01 Jan 0001 00:00:00 +0000

Buho CMS

Mon, 01 Jan 0001 00:00:00 +0000

Contribution in brief

I created a GitHub action workflow that utilizes both Windows and Ubuntu runners. The workflow creates installers for both Windows and Linux. Additionally, it simplifies the release process by automatically including these installers as assets in the final release.

Link to Pull request
Tools used: Git, GitHub action, PowerShell, Bash & Innosetup.

What is Buho CMS?

Buho CMS is a local content management system for static sites. In simple terms it provides a beautiful UI to edit Markdown files (it has more features than that). As of Jun 2023, it supports Hugo, Jkeyll & X static site generators.

HTTPie

Mon, 01 Jan 0001 00:00:00 +0000

Contribution in brief

Recognizing the significance of well-crafted documentation for software, I focused on improving the documentation for HTTPie, a developer-focused tool. I noticed several areas that could benefit from clarification, reorganization, and consistent terminology usage. Keeping in mind the Google developer documentation guidelines, I took the initiative to rephrase and rearrange sections of the documentation, aiming to enhance clarity, simplicity, and accuracy. By addressing these aspects, my goal was to improve the overall quality of the HTTPie documentation and make life of developers easy.

Hugo Blog Awesome

Mon, 01 Jan 0001 00:00:00 +0000

What is Hugo blog awesome?

It is a Hugo theme to create a blog/website using the Hugo static site generator.

Link to GitHub repo: hugo-sid/hugo-blog-awesome
Tech stack: Hugo (Go templating), HTML, SCSS, and JavaScript.

Why did I create this project?

I felt the need to create a blog which is:

Fast - since the final output is static HTML (usually deployed to a CDN) & no external libraries are included
Minimal - because less is more
Responsive - mobile devices can’t be ignored
Light and dark modes - reading content should be less stressful on eyes
Syntax highlighting - code should look like code
RSS feed - support for the old fashioned
No jQuery, Bootstrap, Fontawesome & Google fonts - we don’t need libraries for simple menu toggle, theme toggle, responsive design etc. Saves around 100-200 KB of data transfer on each page load.
100/100 Google PageSpeed Insights score on all 4 metrics - because performance, accessibility, best Practices & SEO matters.

Tools used

Tech: Hugo (Go templating), HTML, SCSS, and JavaScript.

Building reliable, secure systems on Nerdsid.com

Docker networking

Network driver

Networking commands

Find IP of a container

Show networks

Inspect a network

Create a new network

Connect a container to a network

Brief history of Docker

The pre Docker era

Pre VM era

The VM era

Containers

Important principles

Image vs container

Kubernetes DaemonSets

Task 1: How many DaemonSets exist cluster-wide?

Kubernetes Resource Limits

Task 1: Identify the CPU requirements on the rabbit Pod

Using Shell Variables to Avoid Errors

Task

Approach

Solution

Verification

Container Cpu Limit Configuration

Introduction

Scenario

Task

Docker Compose Basic

Introduction

Task 1: Create a Bridge Network

Verify

Task 2: Run a Redis Container

Practical Grep: Filtering Errors and Patterns in Log Files

Introduction

Tasks

Requirements

Solution

Task 1

Docker Environment Variables and Networking

Task 1: Inspect Environment Variables

Custom Resource Definition

Task 1

Task 2

Task 3

Docker Basic Commands

Task 1

Task 2

Task 3

Deployments in Kubernetes

Tasks

Task 1

Task 2

Task 3

Task 4

Pods in Kubernetes

Task

Task 1

Task 2

Publishing Ports in Docker

Task

Solution

Terminal output

Links Worth Your Time

2026

Jun

May

Shell Form vs Exec Form

Linux Journalctl Command Cheat Sheet

Disk usage & vacuum (remove old logs)

Kill Any Process Using a Port in Powershell

Ultimate Vi Shortcuts Cheat Sheet

Big picture of Vim commands

Navigation (movement commands)

2. Editing / insertion commands

How to Fix the Apostrophe (') Key Not Working in VirtualBox Ubuntu

Root cause

Docker assignment 1

Question/assignment

Task 1: Identify the CPU requirements on the `rabbit` Pod

List all files other than `.gz`

1. `tail -f`

2. `tail -F`