Muhammad Imran Bashir’s Post

This #Linux commands #CheatSheet deserves a repost. Oh, here's a BIG shoutout these Linux distros that ALWAYS provide a rock solid RELIABLE computing EXPERIENCE for their users and #WindowsRefugees abandoning #Windows7, #Windows8, #Windows10 or #Windows11 on the desktop of things: #Debian, #LinuxMint / #LMDE / #LMDE7, #MXLinux, #Kubuntu, #ZorinOS, #Fedora, #UbuntuMATE, #UbuntuBudgie, #OpenSuse. Now, IF you absolutely plan on fleeing #WindowsServer in order to save a boatload of cash on licensing, you will NOT be disappointed with these: #Debian, #AlmaLinux or #RockyLinux (both are drop-in replacements for #RHEL aka #RedHat's #EnterpriseLinux). Note: 🤔 I got BIG RESPECT for Windows on the "server side" though IF you MUST manage a #Windows environment. I have had nothing but great computing experieinces with #WindowsServer2012R2 #WindowsServer2016 & #WindowsServer2019. These editions have NEVER ever let me or my clients down in the past when running #QuickBooksPOS aka #QBPOS aka #QuickBooks #PointOfSale. They just run & run & run without any complaints. 🤔

Linux Series – Part 1: Basics + Real-Time Concepts What is Linux? Linux is an open-source operating system used to manage hardware, software, and system resources. It is widely used in servers, cloud, and DevOps environments. Datacenter : A datacenter is a place where organizations store and manage: - Applications - Data - Systems Types: - On-Premise → Managed by the organization - Cloud Datacenter → Provided by cloud companies - Colocation → Renting space in another company’s datacenter Contains: - Servers - Storage systems - Networking devices - Cooling systems - Power backup - Security systems Why Multiple Users? In real environments: - Different people have different roles - Developer → writes code - Tester → tests applications - Admin → manages system Not everyone should have full access. Solution: Users, Groups & Permissions Instead of creating separate servers: - Create multiple users on the same server - Assign permissions (read, write, execute) - Use groups (dev, test, admin) Advantages: - Better security - Cost efficient - Accountability (track who did what) Basic Linux Commands touch → Create a new file touch file.txt ls → List files ll → Detailed list ll -a → Show hidden files cd → Change directory cd /home cd .. (move back one directory) mv → Move or rename files mv file.txt /home/user/ mv old.txt new.txt Understanding Linux is not just about commands, but about managing systems in real environments. #Linux #DevOps #Cloud #BeginnerFriendly #LearningJourney

🚀 The importance of Linux in the DevOps world If there’s a silent pillar supporting the DevOps ecosystem, that pillar is Linux. Most modern infrastructures — whether in cloud environments, containers, or CI/CD pipelines — run on Linux. And that’s no coincidence. Its stability, flexibility, and open-source nature make Linux the ideal choice for scalable and automated environments. In the DevOps daily routine, Linux is everywhere: 🔹 Servers and cloud environments 🔹 Containers with Docker and orchestration with Kubernetes 🔹 Automation scripts (Bash/Shell) 🔹 Monitoring, networking, and security 💡 But how can you start or improve your Linux skills? Here are some practical tips: 📌 Learn basic terminal commands (cd, ls, grep, chmod, etc.) 📌 Understand permissions and user management 📌 Practice automation with Bash scripting 📌 Spin up a Linux server (VM or cloud) and don’t be afraid to break things 📌 Explore logs (/var/log) and learn troubleshooting 📌 Use it daily — practice is everything 📚 A resource that helped me a lot when I was starting: 📌 https://lnkd.in/d-ZzczGs More than memorizing commands, mastering Linux means understanding how things work under the hood — and that’s what truly elevates a DevOps professional. How about you — are you already comfortable with Linux or just starting your journey? 👇 #DevOps #Linux #Cloud #Automation #Infrastructure #IT #Learning

🚀 NCDU – A Powerful Linux Disk Usage Analyzer Every DevOps Engineer Should Know When managing Linux servers (EC2, VPS, or local machines), one of the most common issues is: 👉 “Disk is full — but what is actually consuming the space?” That’s exactly where NCDU (NCurses Disk Usage) comes in. 🔹 What is NCDU? NCDU is a fast, interactive command-line tool used to analyze disk usage in Linux systems. Unlike the traditional du command, it provides a clean, navigable interface to explore storage usage efficiently. ⚙️ Installation: sudo apt update sudo apt install ncdu 🚀 How to Use: Scan entire system: ncdu / Scan specific directory: ncdu /var 📊 Key Features: ✔ Interactive terminal-based UI ✔ Fast directory scanning ✔ Easy navigation with arrow keys ✔ Identify large files instantly ✔ Option to delete files directly from interface 🔥 Real DevOps Use Cases: Debugging full disk issues on EC2 instances Cleaning Docker images and containers Analyzing /var/log file growth Optimizing server storage usage Finding hidden large files quickly ⌨️ Useful Shortcuts: ↑ ↓ → Navigate directories Enter → Open folder d → Delete file/folder q → Quit 💡 Conclusion: NCDU is a must-have tool for Linux system administrators and DevOps engineers. It turns complex disk analysis into a simple, interactive experience and saves significant troubleshooting time in production environments. 🚀 If you manage servers, NCDU should be in your daily toolkit. #Linux #DevOps #SysAdmin #AWS #CloudComputing #NCDU

🚀 Day 2 of #100DaysOfDevOps — Diving into Linux Fundamentals Today, I strengthened my foundation by exploring one of the most essential technologies in the DevOps world — Linux 🐧 🔹 What is Linux? Linux is an open-source, Unix-like operating system known for its stability, security, and flexibility. It powers everything from personal systems to enterprise infrastructure and cloud environments. 🔹 Why Linux for Servers? Linux is the backbone of modern servers because it is: ✔️ Highly secure and reliable ✔️ Lightweight and efficient ✔️ Scalable for large systems ✔️ Strongly supported by the open-source community ✔️ Perfectly suited for cloud and containerized environments 🔹 Users in Linux Understanding user roles is crucial for system security: 👤 Root User – Full administrative control 👤 Regular Users – Limited access for daily tasks 👤 sudo – Grants temporary administrative privileges 👥 Groups – Simplifies permission management 💻 Key Linux Commands I Practiced Today 🔹 System Commands (Managing the OS) Commands like uname, hostname, and uptime help monitor system info. whoami, id, and pwd identify users and directories. File operations using ls, cd, mkdir, rm, and cp are fundamental for navigation and management. Tools like top, ps, and kill are essential for process management. 🔹 Hardware Commands (Understanding System Resources) Commands such as lscpu, lsblk, and free -h provide insights into CPU, storage, and memory. lspci and lsusb detect connected devices. dmidecode and smartctl help analyze hardware health and system-level details. 🔹 Switch/Network Commands (Connectivity & Networking) ip -a and ip -r help manage IP addresses and routing. ping and traceroute are used for connectivity testing. netstat and ss display network connections and ports. Tools like curl, wget, nslookup, and dig are essential for network communication and troubleshooting. 🧠 Key Takeaways ✔️ Everything in Linux is treated as a file ✔️ Permissions (read, write, execute) control access ✔️ The shell is powerful for automation ✔️ Linux is the core of DevOps and modern infrastructure 🔥 Consistency is key — one step closer to mastering DevOps! #DevOps #Linux #100DaysOfDevOps #CloudComputing #LearningInPublic #TechJourney #SystemAdministration #Networking #Automation #flm

🚀 New Blog Published: Linux Networking Basics for DevOps Engineers When I started learning DevOps, one thing that confused me the most was networking. Commands were easy to memorize, but understanding how systems actually communicate was the real challenge. In real-world DevOps environments, most issues are not in the code — they are in the network. That’s why having a strong grip on Linux networking is essential for debugging, monitoring, and system reliability. In this article, I explain: ✅ Core networking commands like ip, ping, ss, curl, and dig ✅ How to check connectivity, DNS, and open ports ✅ Step-by-step troubleshooting approach used in real scenarios ✅ Easy diagrams to visualize network flow ✅ How DevOps engineers debug issues in production 📖 Read here: https://lnkd.in/eKTTZnPk 💡 If you're: • Preparing for DevOps interviews • Working with Linux servers • Tired of “it’s not working” without knowing why This will help you think like a real engineer. 🔥 One truth: You don’t debug apps… You debug the network behind them. Let me know in comments 👇 What’s the most confusing Linux networking command for you? #DevOps #Linux #Networking #Cloud #Kubernetes #Tech #Learning #Beginners #devopsjourneywithrahul #rahulshukla

DevOps is 10% knowing the tools and 90% knowing how to fix things when they break. I’m currently on Day 2 of my deep dive into Linux troubleshooting for DevOps and Cloud roles. It’s one thing to run a command; it’s another to handle a high-pressure scenario when a production server is at 90% capacity. Today’s focus was on the "Surgical Skills" of a Linux Admin: Storage Triage: Finding and truncating massive logs in /var without breaking active processes. The "Kill" Logic: Understanding when to use a polite SIGTERM vs. the forceful kill -9. Automation: Writing health-check scripts to ensure services like Nginx "self-heal" if they go down. Connectivity: Systematically troubleshooting SSH failures from the security group level down to the .ssh permissions. The "shiny" tools like Kubernetes and Terraform are built on this Linux foundation. Strengthening these basics is the only way to build reliable, world-class infrastructure. One step closer to the goal. Onward! #DevOps #Linux #CloudComputing #TechLearning #CareerGrowth #Automation Abhishek Veeramalla

🚀Linux for DevOps - Must-Know Basics Linux is the backbone of DevOps. Every DevOps engineer should be comfortable with these core areas: 🔹File Management - Is, cp, mv, rm 🔹Permissions - chmod, chown 🔸Process Management - ps, top, kill 🔹Networking - ping, netstat, ss, curl 🔸Package Management - yum, apt 🔹Disk & Memory - df, du, free 🔸Logs Monitoring - tail -f, less, grep Strong Linux fundamentals = Strong DevOps foundation #DevOps #Linux #SysAdmin #Cloud #AWS #ITSkills #LearningJourney #Automation #Linux #DevOpsEngineer

🚀 Day 5 – Linux Basics for DevOps Headline: If you want to succeed in DevOps, get comfortable with Linux. 🐧 Most servers, cloud systems, and DevOps tools run on Linux. So understanding Linux basics is non-negotiable. 🔹 Why Linux Matters In real-world environments: Applications run on Linux servers Containers are Linux-based Cloud VMs use Linux 👉 You will interact with Linux daily in DevOps. 🔹 What You Should Know First Start with basic commands: 📌 Navigation pwd → current directory ls → list files cd → change directory 📌 File Operations mkdir → create folder rm → delete files cp → copy files mv → move/rename files 📌 Viewing Files cat → view file less → scroll file tail -f → live logs 🔹 Process & System Commands top → view running processes ps → process status df -h → disk usage free -m → memory usage 👉 These are very useful during production issues 🔹 Permissions (Very Important) Linux uses permissions: Read (r) Write (w) Execute (x) Commands: chmod → change permissions chown → change ownership 🔹 Real DevOps Use In real scenarios, you’ll: ✔ Check logs ✔ Restart services ✔ Debug issues ✔ Monitor system health All using Linux commands. 🔹 The DevOps Mindset Don’t just run commands. 👉 Understand what they do and when to use them. 💬 Discussion: Which Linux command do you use the most in your daily work? #DevOps #Linux #TechLearning #CloudEngineering #Beginners #SRE

Most DevOps engineers know how to use Linux. Almost none of them know how Linux works. Tell me if this sounds familiar: You can SSH into a server. You can run commands. You can read logs. But if I ask you: “What actually happens between the moment you press Enter and the moment that process starts running?” Most people go quiet. That’s not a gap in your Linux knowledge. That’s a gap in your Linux understanding. At Nixace, we teach both. You learn the commands. But you also learn the kernel scheduler. The VFS layer. How processes inherit file descriptors. Why fork() works the way it does. What a signal actually is — not just how to send one. Why does this matter for DevOps? Because when things break — and in production, things always break — the engineer who survives is the one who understands what’s underneath. The one who doesn’t is the one filing a ticket saying “server seems slow.” Linux internals, Linux kernel, process management, system calls, file system architecture, DevOps engineering, cloud infrastructure, debugging production issues, performance tuning, backend systems, distributed systems #LinuxInternals #DevOps #CloudEngineering #SystemsThinking #NixaceTraining