Hey DevOps Learners! 👋
Welcome back to my DevOps learning journal. After starting this journey with my first blog, where I shared why I chose KodeKloud and Hashnode, today I want to dive into what I’ve learned so far.

Before touching advanced tools like Docker or Kubernetes, I realized I needed to build a solid base in Linux, networking, services, and app basics. That’s exactly what the DevOps Pre-Requisites course from KodeKloud helped me achieve.

🐧 Just Enough Linux to Get Started

Linux is the beating heart of DevOps. Here's what I practiced:

Basic Commands: ls, cd, pwd, mkdir, touch, rm
Working with Files: cat, cp, mv, nano, vi
User Management: whoami, su, sudo, id
File Permissions and chmod, chown
Services with systemctl — starting/stopping Apache, Python apps

🔧 I even created my own systemd service using Python!

⚙️ Navigating the Terminal

Getting comfortable with CLI tools and shells:

Shell types: bash, sh, zsh
Redirection, piping, and chaining commands
Using vi for editing files from terminal

🌐 Networking Fundamentals

A big part of DevOps is troubleshooting connectivity between systems. Here’s what I worked through:

IP addressing and checking configs using ip addr show
NAT vs Bridged vs Host-only networks in VirtualBox
SSH access into VMs and using scp
Port forwarding and common SSH issues

💡 Now I can connect to and debug networked VMs like a pro!

🖥️ Setting Up Lab Environments

To simulate real-world environments, I learned to:

Install and configure VirtualBox
Use Vagrant to spin up VMs with pre-configured settings
Create multiple VMs with shared networks
Manage VM snapshots for safe rollbacks

🧑‍💻 Application Awareness: Python, NodeJS, Java

As a DevOps engineer, you don’t need to be a master coder—but you must understand how apps are built and run.

I explored:

Python basics and running Flask apps
Node.js with npm packages and Express
Java with JDK and WAR/JAR builds
Build tools like gradle, maven

🌐 Web Servers & Deployments

I deployed static and dynamic apps using:

Apache HTTP Server
Tomcat (Java-based deployments)
Understanding ports like 80, 8080, 443

I also configured:

Virtual hosts (www.houses.com, www.oranges.com)
Port mapping and DNS-style redirection with /etc/hosts

🔐 Package Managers

Whether it’s app libraries or system tools, I learned:

Tool	Language/System	Commands
`yum`	Linux	Install system packages
`pip`	Python	Install Python libraries
`npm`	NodeJS	Manage JavaScript dependencies

Now I can easily install, upgrade, or remove packages across stacks.

📝 Summary of Skills Learned So Far

Area	Skills Practiced
Linux	CLI, file management, services, permissions
Networking	IP setup, SSH, NAT/Bridge configs
App Understanding	Python, NodeJS, Java, builds, environments
Web Servers	Apache, Tomcat, static & dynamic content
Virtualization	VirtualBox + Vagrant
Package Managers	yum, pip, npm

📅 What’s Next?

Now that I’ve completed the Networking Basics section — including switching, routing, and DNS resolution — my next stop is:

🔐 SSH and Remote Access

Up next in the KodeKloud DevOps Pre-Requisites course, I’ll be learning about SSH (Secure Shell) — a powerful way to securely connect to remote servers.

This will include:

What SSH is and why it’s important
How to SSH into a Linux machine
Key-based authentication setup
Practical labs on real Linux systems

It’s an essential skill for any DevOps engineer managing cloud-based infrastructure, remote deployments, or automation.

🙌 Let’s Connect

If you’re just starting out or thinking about DevOps, feel free to follow my blog or drop a comment. Let’s learn together!

– Honey Kumar

🌱 Building My DevOps Foundation: From Linux to Networking and Beyond