Git Cheat Sheet for DevOps and Software Development

🚀 From Zero to 10 Running Containers – My DevOps Hands-on Journey 🔥 Today I built a complete end-to-end Docker setup from scratch and scaled it like a pro 💪 🔹 Installed Docker on Linux VM 🔹 Pulled Nginx image 🔹 Cloned project from GitHub 🔹 Deployed custom app inside container 🔹 Created custom Docker image (streamflix) 🔹 Configured Docker Network 🔹 Exposed application via ports 🔹 Scaled application to 10 containers 🚀 💡 Faced real-world issues & learned: ❌ Permission denied (Docker socket) ❌ Wrong command syntax (network, commit) ❌ Network not found issue ❌ Container name conflicts ✅ Fixed everything step by step like real DevOps engineer 🔥 Final Result: 👉 10 containers running on ports 8081–8090 👉 Fully working scalable setup This is what real learning looks like – Not just theory, but solving real errors 💯 📌 Key Learning: "Errors are not failures, they are DevOps tutorials in disguise." #DevOps #Docker #Linux #Cloud #Azure #Kubernetes #LearningByDoing #100DaysOfDevOps#devopsinsiders

DevOps Essentials — Commands Every Engineer Should Know Whether you're just getting started or sharpening your workflow, mastering the fundamentals across the DevOps stack makes a huge difference in productivity. 🔹 Linux Basics Navigate, manage files, and inspect logs efficiently — the foundation of everything. 🔹 Git & Docker Version control + containerization = consistent, reliable deployments. 🔹 Kubernetes Orchestrate containers at scale and keep your applications resilient. 🔹 Terraform Infrastructure as Code helps you build, change, and version infrastructure safely. 🔹 Ansible Automate configuration and reduce repetitive manual work. 🔹 AWS CLI Manage cloud resources directly from your terminal with speed and precision. 💡 The real power of DevOps isn’t just tools — it’s how seamlessly you connect them. For more 👉 w3schools.com What’s one command or tool you use daily that you couldn’t live without? 👇 #DevOps #CloudComputing #Linux #Docker #Kubernetes #Terraform #Ansible #AWS #Automation #TechCareers GitHub

I started exploring DevOps recently, and honestly, it’s been eye-opening. Coming from a backend background, I always focused on building APIs and features. But now I’m starting to understand what happens around the code. So far, I’ve explored: • How the Software Development Life Cycle actually works • Where DevOps fits in the bigger picture • Basics of project management • Working with Virtual Machines • Launching and managing instances on AWS EC2 • Using AWS CLI • Linux fundamentals + shell scripting • File permissions in Linux • Version Control with Git & GitHub Still early, but things are starting to connect. Next week, the plan is simple: → Deploy a Node.js app on AWS (end-to-end) → Get hands-on with Infrastructure as Code (Ansible & Terraform) Trying to move from “I know this” → “I can actually use this in a real setup.” If you’ve been down this path, I’d love to hear — what should I focus on next? #DevOps #AWS #Linux #Backend #LearningInPublic

Learning stops when you stop at the stage when things break. Great learning and mastery is a loop and iterations give a solid outcome.

Stop copy-pasting your YAML jobs. The Matrix Strategy in Azure DevOps is your DRY (Don't Repeat Yourself) best friend. It lets you define a single job and run it across multiple configurations automatically. 🚀 You can use it for: - Cross-Platform Testing: Run the same suite on Ubuntu and Windows simultaneously. - Version Parity: Test against Node 20, 22, and 24 without duplicating steps. - Parallelization: Use maxParallel to speed up your CI/CD pipeline. 🛠️ What it looks like: Check the code-snippet beneath. Notice how $(os) and $(config) act as placeholders. The matrix fills those in automatically for every parallel run. 💡 Pro-Tip: This isn't just an Azure thing.  GitHub Actions uses a nearly identical strategy: matrix to generate job permutations automatically. GitLab CI achieves the same efficiency using the parallel: matrix keyword. #AzureDevOps #DevOps

Honestly? DevOps scared me. Every time I saw a DevOps job description — Kubernetes, Terraform, Ansible, AWS, CI/CD, Docker, Jenkins, Prometheus — I felt like these people were speaking a completely different language. I kept telling myself: "I'll start when I feel ready." Spoiler: that day never came on its own. So last month I just opened a YouTube video, installed Docker, and started. Day 1 was humbling. I couldn't even get a container to run properly. I spent 45 minutes on a problem that had a one-line fix. But here's what nobody tells you about starting something hard: The confusion isn't a sign you're not cut out for it. The confusion means you're learning. Right now I'm focusing on three things only: → Docker — understanding containers before I touch anything else → Linux basics — because everything in DevOps runs on Linux → Git & GitHub — version control is the backbone of all of it I'm not jumping to Kubernetes yet. Not touching cloud platforms yet. Not overwhelming myself with 15 tools at once. One solid foundation. Then the next layer. You don't need to know everything to start. You just need to start. If you're on the same path — learning DevOps from scratch in 2026 — I want to connect with you. We're building in public together. 🤝 #DevOps #LearningInPublic #Docker #Linux #BeginnerDeveloper #TechCommunity #CareerGrowth #DevOpsJourney

🚀 DevOps Basics Series How All DevOps Concepts Connect Over the past few posts, I’ve explored: DevOps → CI/CD → Networking → Linux → Docker → Kubernetes At first, they felt like separate concepts. But they’re not. They’re all parts of one system working together. The Bigger Picture. Here’s how it all connects: • Code is written and pushed (Git) • CI/CD pipelines build and deploy it • Docker packages the application • Kubernetes manages and scales it • Services & Load Balancers expose it • DNS makes it reachable 🌐 What Happens in Reality When a user accesses your app: Request → DNS → Load Balancer → Service → Pod → Container → Response All of this happens in milliseconds. DevOps is not about tools. It’s about how these pieces work together to deliver software reliably. 💡What Changed for Me : I stopped learning tools in isolation and started understanding the system as a whole. In simple terms: DevOps is about connecting everything so users get a fast and reliable experience. #DevOps #Cloud #Kubernetes #Docker #LearningInPublic

🚀 Day 11 of My 30 Days DevOps Challenge Today I dived deeper into version control and explored Advanced Git concepts — the skills that truly matter in real-world team collaboration 🔥 It’s not just about pushing code anymore… it’s about managing changes efficiently, resolving conflicts, and maintaining a clean project history. 💡 What I learned: 🔹 Git Stash Temporarily saving changes without committing — useful when switching tasks 🔹 Git Rebase Keeping commit history clean and linear by avoiding unnecessary merge commits 🔹 Merge Conflicts Understanding how conflicts occur and resolving them manually 🛠️ Hands-on Work: ✔ Used git stash to save and restore changes ✔ Performed git rebase to maintain clean commit history ✔ Created and resolved merge conflicts manually 📂 GitHub Repository: https://lnkd.in/gJVDpbRF 📌 Key Takeaway: Writing code is one part — managing it efficiently in a team is what makes you a strong developer or DevOps engineer. 💬 Today I realized: mastering Git is not optional, it’s essential. #DevOps #Git #VersionControl #LearningInPublic #30DaysOfDevOps #Automation #AWS #SoftwareEngineering

🚀 Day 4 – Terraform Basic Commands (#15DaysOfTerraform) 🤯 Wrote Terraform code… But how do you actually run it? 🤔 Let’s learn the core commands ⚙️🔥 📘 Essential Terraform Commands 🛠 1. Initialize Bash terraform init 👉 Prepares project 👉 Downloads providers 🛠 2. Validate Bash terraform validate 👉 Checks syntax errors 👉 Ensures code is correct 🛠 3. Plan Bash terraform plan 👉 Shows what will be created/changed 👉 No actual changes yet 🛠 4. Apply Bash terraform apply 👉 Creates infrastructure 👉 Executes your code 🛠 5. Destroy Bash terraform destroy 👉 Deletes all created resources 🔄 Workflow Init → Validate → Plan → Apply 🚀 💡 Why This Matters? ✅ Full control over infrastructure ✅ Avoid unexpected changes ✅ Safe & predictable deployments 🎯 Key Takeaway Don’t run blindly ❌ Always follow: 👉 Init → Plan → Apply Next 👉 Day 5 – Variables & Outputs 🔥 #Terraform #15DaysOfTerraform #Cloud #LearningInPublic 🚀#Docker #DevOps #Containerization #Jenkins #CloudComputing #Containers #Maven #Microservices #VirtualMachines #SoftwareEngineering #TechLearning #CloudNative #SRE #DevOpsTools #ITInfrastructure #DeveloperTools #Automation #Kubernetes #Volumes #CloudDeployment #TechnologyTrends #DigitalTransformation #Linux #Ansble #Programming #InfrastructureAsCode #flm #frontlinemedia #frontlinesedutech

😩 I installed … and thought I became DevOps engineer overnight. Reality slapped me 💥 👉 Containers not running 👉 Ports not working 👉 “Why localhost not opening???” 😭 I almost gave up. Then I realized something simple: 🚨 Docker is NOT hard. Your basics are weak. So I stopped crying… and started fixing 👇 ✔ Learned what a container actually is ✔ Understood ports (not just copy-paste) ✔ Ran simple commands again and again And suddenly… things started working. Lesson: 👉 Tools don’t make you skilled 👉 Understanding does You don’t need 100 tools. You need clarity on 1 tool. Now my rule: Learn less. Understand more. Build daily. 💻🔥 👇 If this hit you: Like 👍 | Follow 🔔 | Repost 🔁 #docker #devops #linux #learning #buildinpublic #beginners