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Articles by TechNotesHub
ECS Part 3: Deploy to Fargate — Cluster, Task, Service
Create the cluster, define the task, run it as a service, open the security group — your container is live.
ECS Part 2: Create ECR Repository & Push Docker Image
Create a private image registry, authenticate Docker, tag & push. Four commands you'll use forever.
ECS Part 1: Write the Dockerfile & Configure AWS CLI
A minimal Apache Dockerfile + creating an IAM user with ECR permissions + configuring `aws configure`.
Deploy a Container on AWS: Dockerfile → ECR → ECS Fargate
The complete story of getting a Docker container to run on AWS with zero servers to patch — starts here.
CI/CD Project Part 5: Monitoring with Prometheus + Grafana
Add observability to the pipeline — download Prometheus, install Grafana, wire them together, dashboard the whole cluster.
CI/CD Project Part 4: The Complete Jenkinsfile (11 Stages)
The full annotated Jenkinsfile: checkout, test, scan, quality-gate, build, publish artifact, build image, scan image, push, deploy, notify.
CI/CD Project Part 3: Jenkins + Nexus + SonarQube + Docker
Install the DevOps toolchain — the Jenkins bash install script, Nexus in Docker, SonarQube in Docker, and kubectl on Jenkins.
CI/CD Project Part 2: Install Kubernetes with kubeadm
Full transcript of the kubeadm commands to bring up a 1 master + 2 worker cluster on Ubuntu, ready for real workloads.
CI/CD Project Part 1: Provision AWS Infrastructure
Six Ubuntu VMs, one security group, ready for Kubernetes and Jenkins. Step-by-step in the AWS console.
Real Project: Deploy a Java App with Jenkins, SonarQube, Nexus, Docker & Kubernetes
The complete DevOps pipeline you'll build in this series — 6 servers, 7 tools, 1 Jenkinsfile. Start here.
Git Cheat Sheet: Every Command You'll Actually Use
From `git init` to `git rebase -i` — the practical Git workflow you'll use daily, with what each command really does.
Linux Cheat Sheet Part 2: Text, Networking, Archives, Scripting
grep / sed / awk, ssh / curl / netstat, tar / zip, and just enough Bash to write your own scripts.
Linux Cheat Sheet Part 1: Files, Directories & Processes
The everyday Linux commands you'll type a hundred times a week — with what they do in plain English.
K8s Errors Part 3: Cluster / Storage / RBAC / Autoscale
The remaining 20 errors — RBAC, HPA not scaling, PVC pending, ETCD sadness, cert expiry, quotas and more.
K8s Errors Part 2: Networking (Services, DNS, Ingress, CNI, NetworkPolicy)
"It works on my pod, why not the service?" — 15 network-layer errors and their fixes.
K8s Errors Part 1: Pod-Level (Crash, Pending, ImagePull, OOM)
Fifteen pod-level errors and how to fix each — from CrashLoopBackOff to Pods stuck in Terminating.
Kubernetes Troubleshooting: 50 Common Errors — Overview
A field guide to the most common Kubernetes errors, grouped so you know exactly which article to open when your cluster is on fire.
AZ-104 Part 5: Monitor, Backup & Recovery
Azure Monitor metrics vs logs, Log Analytics with KQL, Backup Vaults, Site Recovery, and where Sentinel fits.
AZ-104 Part 4: Networking (VNet, NSG, VPN, Load Balancer, DNS)
The Azure network stack in one article — VNet peering, NSG rules, VPN vs ExpressRoute, Load Balancer vs App Gateway, Traffic Manager routing.
AZ-104 Part 3: Compute (VMs, Availability, VMSS, App Service, AKS)
Every way Azure lets you run code, from bare VMs to fully-managed containers, with the exam's key uptime numbers.
AZ-104 Part 2: Storage, Redundancy & Access Tiers
Storage Accounts, Blob vs File vs Disk, LRS/ZRS/GRS explained with a picture, plus SAS tokens and Soft Delete.
AZ-104 Part 1: Identity & Governance (Azure AD, RBAC, Policy)
Users, groups, roles, subscriptions and Management Groups — the plumbing that decides *who can do what* in Azure.
Azure AZ-104 Study Guide: Roadmap & Summary
One-page map of the whole AZ-104 exam — the 5 domains, what each covers, and where to click next for the deep dive.