CodeKerdos

27/09/2026

🐳 Docker ARG vs ENV

Two variables, two different purposes:
🔹 ARG → Build time
🔹 ENV → Runtime

ARG helps customize an image during the build, while ENV makes variables available to processes running inside the container.
A small Docker concept, but a common interview question.

🎯 Preparing for DevOps & SRE product-based interviews? DM CodeKerdos to know about our Special Interview Preparation Batches.

Kubernetes CodeKerdos

26/09/2026

🐳 Docker CMD vs ENTRYPOINT: What’s the Difference?

If you’ve worked with Dockerfiles, you’ve probably seen both CMD and ENTRYPOINT.

They look similar.
But they serve different purposes.

CMD defines the default command or arguments for a container.

ENTRYPOINT defines the main executable the container is built to run.

And when you use them together:

ENTRYPOINT [“python”]
CMD [“app.py”]
Docker runs:
python app.py

That’s why understanding how CMD and ENTRYPOINT work together is important, not just memorizing their definitions.

💡 Interview tip: Be ready to explain what happens when you override CMD, pass arguments to docker run, or use —entrypoint.
Want to go beyond Docker basics and prepare for real-world DevOps & SRE interviews?

👉 DM CodeKerdos to know about our Special DevOps/SRE Interview Preparation Batches.

DockerInterview Kubernetes CloudEngineering InterviewPreparation Codekerdos

26/09/2026

21/09/2026

AI Can Code. Can You Engineer?

AI can write code.
It can generate functions, APIs, components, and even entire features.

But software engineering is much more than writing code.

The real skill is understanding:

* Architecture
* System design
* Scalability
* Trade-offs
* Reliability
* Security
* Performance
* How everything fits together

As AI gets better at coding, developers need to move up the abstraction ladder — from writing code to engineering systems.

Because at the end of the day:

Code is just a means to build a well-engineered product.

The future isn't AI vs developers.
It's about developers who know how to think like engineers and use AI to execute faster.
SystemDesign codekerdos maangprep

16/09/2026

Hands-on learning at CodeKerdos just got better.

We’re excited to bring Esc Bash hosted labs to CodeKerdos students.
Our goal has always been to go beyond theory and give learners a place to practice, troubleshoot, break things, and fix them, just like engineers do in the real world.

With this, now our students will have:
• Lifetime access to CodeKerdos Troubleshooting Labs
• Access to hosted Escbash labs for hands-on practice
• Practical environments across DevOps, SRE, Cloud & Kubernetes

A big thank you to AbhishekVeeramalla for building Escbash and making technical learning more hands-on.

This is another step toward making learning by doing a core part of CodeKerdos.

Don’t just learn DevOps. Learn to fix it. DM us to know more about courses.
CloudComputing DevOpsTraining HandsOnLearning

14/09/2026

If you're preparing for AI System Design interviews, don’t just focus on LLMs and prompting.

These 7 concepts are worth preparing really well:

1. RAG — Retrieval-Augmented Generation
2. Fine-Tuning — Adapt model behavior to specific tasks
3. Evaluations — Measure whether your AI system actually works
4. Observability — Understand what’s happening inside production
5. Caching — Improve latency and reduce cost
6. User Feedback Loops — Learn from real-world user interactions
7. Guardrails — Keep AI systems safe, reliable, and controlled

These topics become especially important when you move from “How do I use an LLM?” to “How do I design a reliable AI system at scale?”

Save this reel for your AI System Design interview prep and share it with someone preparing for AI/ML interviews.

Which of these 7 would you like me to cover in detail next?

14/09/2026

✨ A little DevOps twist to the festivities.
Wishing everyone a very Happy Ganesh Chaturthi! 🐘🙏
May Bappa bless us with new beginnings and remove all obstacles. 🪔

12/09/2026

🖥️ POV: You’re an IT Engineer in 1985

Welcome to the retro era of IT. 📼
No Linux.
No Git.
No cloud.

Just Unix, MS-DOS, CRT monitors, floppy disks, physical servers… and a telephone. ☎️
Need to deploy something?
“Where’s the floppy?” 💾
Server crashed?
“Call Bob. He knows this machine.” 😂

Internet?
Yep, it existed—but by the end of 1985, only around 2,000 hosts were on interconnected TCP/IP networks.
And Windows 1.0 had just arrived.

1985 IT:
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Please wait...
Please wait...
Still waiting... 😂

ComputerHistory Unix MSDOS Nostalgia IT CodeKerdos

10/09/2026

Ever wondered how Kubernetes decides which Pods matter more when resources get tight? That’s where PriorityClass comes in.

It lets you assign different priority levels to Pods, so Kubernetes can schedule higher-priority workloads first and, when necessary, preempt lower-priority Pods to make room for more important workloads.

This is especially useful for critical production services, platform components, and workloads that must remain available.

But PriorityClass is just one piece of the puzzle. If you want to go beyond basic Kubernetes and learn Advanced DevOps + SRE, production-grade Kubernetes, cloud, observability, automation, and reliability engineering, CodeKerdos can help.

DM us to learn about our Advanced DevOps + SRE program.

AdvancedDevOps CloudNative SiteReliabilityEngineering CodeKerdos