Linux Memory Leak Detection: Free, Swap, and Top Consumers

🐧 Save This Linux Command Cheatsheet — You'll Thank Yourself Later! Whether you're a developer, DevOps engineer, or just starting your Linux journey, knowing your way around the terminal is a superpower. 💻 Here's a quick breakdown of what's covered in this cheatsheet: 📁 Files & Navigation — Move, copy, rename, delete, and explore your file system like a pro. 🌐 Networking — From pinging hosts to downloading files and SSH connections. ⚙️ Processes — Monitor and manage running processes with ease. 🖥️ System Info — Know your system's CPU, memory, disk, and uptime at any time. 📦 Archive & Compress — Master tar commands for bundling and extracting files. 🔐 Permissions — Understand chmod and control who can read, write, or execute. 🔍 Other Commands — grep, locate, whereis, and man — the unsung heroes of Linux. The terminal isn't scary — it's just a language. The more commands you learn, the faster and more powerful your workflow becomes. 🔖 Bookmark this post and share it with someone learning Linux! #Linux #DevOps #Programming #SoftwareDevelopment #CloudComputing #Tech #OpenSource #Coding #LearningInPublic #Terminal

🐧 Save This Linux Command Cheatsheet — You'll Thank Yourself Later! Whether you're a developer, DevOps engineer, or just starting your Linux journey, knowing your way around the terminal is a superpower. 💻 Here's a quick breakdown of what's covered in this cheatsheet: 📁 Files & Navigation — Move, copy, rename, delete, and explore your file system like a pro. 🌐 Networking — From pinging hosts to downloading files and SSH connections. ⚙️ Processes — Monitor and manage running processes with ease. 🖥️ System Info — Know your system's CPU, memory, disk, and uptime at any time. 📦 Archive & Compress — Master tar commands for bundling and extracting files. 🔐 Permissions — Understand chmod and control who can read, write, or execute. 🔍 Other Commands — grep, locate, whereis, and man — the unsung heroes of Linux. The terminal isn't scary — it's just a language. The more commands you learn, the faster and more powerful your workflow becomes. 🔖 Bookmark this post and share it with someone learning Linux! #Linux #DevOps #Programming #SoftwareDevelopment #CloudComputing #Tech #OpenSource #Coding #LearningInPublic #Terminal

🚀 Day 2: Linux Internals for DevOps Engineers 👉 Process Management (How Linux runs everything) Every application we use is just a process running inside the system. But here’s what most people don’t realize… Linux is constantly deciding: Which process gets CPU Which process waits Which process gets killed 📌 Key Concepts I Learned: 🔹 A process = running instance of a program (with PID, memory, CPU time) 🔹 Processes go through lifecycle: Running → Waiting → Terminated 🔹 Commands like ps, top, and kill help manage them 💡 Real Scenario: Your server CPU suddenly hits 100%. What do you do? 👉 Run top 👉 Identify the process 👉 Kill it or optimize it This is where understanding Linux internals becomes critical. 🧠 Question for you: What happens if a process refuses to stop even after using kill? 👇 Drop your answer! 🎯 Learning Goal: To understand how systems behave under real production load, not just theory. 📅 Day 3 Tomorrow: Memory Management (RAM, Swap & OOM Killer) Let’s keep learning in public 🚀

🔐 Still confused about Linux file permissions? This simple trick will make it click instantly. If you've ever seen something like chmod 755 or rwxr-xr-x and wondered what it really means - you're not alone. I used to memorize it… until I actually understood it. Here’s the simplest way to break it down: 👉 Linux permissions are split into 3 groups User (owner) Group Others 👉 Each group has 3 permissions: Read (r = 4) Write (w = 2) Execute (x = 1) 👉 Add them up to get numbers: rwx = 4+2+1 = 7 rw- = 4+2 = 6 r-x = 4+1 = 5 So when you see: chmod 765 file It means: User → 7 → rwx Group → 6 → rw- Others → 5 → r-x 💡 Pro tip: Think of it as binary → octal → symbolic 111 → 7 → rwx Once you see it this way, permissions stop being confusing and start feeling logical. This is one of those small DevOps/Linux fundamentals that saves you hours of debugging later. If you're learning Linux, don’t skip this - master it early. #Linux #DevOps #CloudComputing #AWS #Kubernetes #SystemAdministration #TechLearning #Programming #DeveloperJourney #OpenSource

We literally used sudo in the last lecture… And no one asked why. That’s the problem. Most people learning Linux for DevOps don’t actually learn things… They just follow along. Run this command. Copy that step. It works - so they move on. Until one day… Production says: Permission denied. And suddenly: – Commands stop working – Logs are inaccessible – Panic starts Because now it’s not about what to type It’s about who you are in the system User? sudo user? root? That difference decides everything. I’ve seen engineers who know Docker, Kubernetes, CI/CD… But still get stuck on something as basic as privileges. Not because it’s hard - But because no one explained it properly. So instead of just using sudo again… We stopped. And broke it down: – What actually happens when you run sudo – Why switching to root is risky – When to use su vs sudo in real systems Because DevOps is not about running commands. It’s about understanding control. And in Linux… control starts with privileges. If you’ve ever used sudo without thinking… You should probably watch this one. Link in comments 👇 #Linux #DevOps #CloudComputing #SystemDesign #AWS #DevOpsEngineer #LinuxCommands #TechCareers #Programming

If you’re learning Linux… Start with these commands. These are used daily by DevOps engineers: 📂 File & Directory ✔ ls — list files ✔ cd — change directory ✔ pwd — current path ✔ mkdir — create folder ✔ rm — delete files 📄 File Operations ✔ cp — copy ✔ mv — move/rename ✔ cat — view file ✔ nano / vim — edit 🔍 Search & Filter ✔ grep — search text ✔ find — locate files ⚙️ System & Processes ✔ ps — running processes ✔ top — system usage ✔ kill — stop process 🌐 Networking ✔ ping — check connectivity ✔ curl — API requests ✔ ss / netstat — ports 📜 Logs ✔ tail -f — live logs ✔ journalctl — system logs Simple rule: 👉 Don’t memorize 👉 Practice daily These commands = your foundation. Master them, and everything else becomes easier. Save this cheat sheet. Follow me if you want real DevOps skills (not tutorial knowledge). #Linux #DevOps #CloudComputing #CheatSheet #Engineering

🚀 Brushing Up My DevOps Foundations: Linux Commands That Power Everything As part of strengthening my DevOps skill set, I’ve been revisiting one of the most fundamental yet powerful tools in the ecosystem — Linux. Understanding Linux commands is not just about navigating a system; it's about gaining control, efficiency, and deeper insight into how infrastructure works behind the scenes. Here are a few essential commands I’ve been focusing on: 🔹 ls, cd, pwd – Navigating directories 🔹 grep, find – Searching like a pro 🔹 chmod, chown – Managing permissions 🔹 top, ps – Monitoring system performance 🔹 tar, zip – Handling archives 💡 What I’m realizing is that mastering these basics builds a strong foundation for tools like Docker, Kubernetes, and CI/CD pipelines. Consistency is key — small daily improvements lead to big results. Excited to keep learning and growing in the DevOps journey! #DevOps #Linux #LearningJourney #CloudComputing #Upskilling #TechCareers

When I started as an SRE, I wish someone had given me a simple guide to automate the boring stuff as I spent hours manually cleaning logs, checking servers, and restarting stuck pods. So I built one myself. This repo is my humble attempt to give back – a simple, practical guide for anyone stepping into Linux, Kubernetes, or site reliability. Inside you'll find: 📁 A folder structure that makes sense   📄 Real bash scripts you can run today   📚 A README that explains each one  No fluff. Just tools I use daily. This is the "starter kit" I would have killed for 5 years ago. 🔗 https://lnkd.in/eMrdTn4C Also please let me know if you have another idea to add on this #SRE #Linux #Kubernetes #Mentorship #Automation #Bash

🚀 Day 4/30 – DevOps Journey Today I explored advanced Linux commands that are very useful in real-world DevOps tasks. 💡 Key Learnings: grep command to search text inside files Pipe (|) to combine multiple commands cat command to read file content echo command to create and modify files 🔍 Also explored: grep options like -i (ignore case), -n (line numbers) Filtering and processing command outputs using pipes 💻 Hands-on: Created files and added content using echo Searched specific words using grep Combined commands to filter output efficiently 📈 How I Improved: Gained better understanding of command-line usage Learned how to combine commands instead of running them separately Improved my ability to analyze file content quickly Built confidence working with Linux terminal 📌 Key Takeaway: Combining commands using pipes makes Linux very powerful for tasks like log analysis, debugging, and automation. 🔗 GitHub (Day 4 work): https://lnkd.in/gJVDpbRF Learning step by step and improving every day 💪 #DevOps #Linux #Automation #Cloud #LearningJourney #30DaysChallenge

🚀 Day 3/30 – DevOps Journey Today I focused on understanding Linux file permissions, which play a critical role in system security and access control. 💡 Key Learnings: Types of permissions: Read (r), Write (w), Execute (x) Permission groups: User, Group, Others Understanding permission format (e.g., rwxr-xr-x) Using chmod to modify permissions Basics of chown for ownership management 💻 Hands-on: Created files and checked permissions using ls -l Modified permissions using chmod Observed how access changes based on permission settings 📌 Key Takeaway: Linux permissions are essential for securing systems and managing user access in real-world DevOps environments. 🔗 GitHub (Day 3 work): https://lnkd.in/gJVDpbRF Step by step, building strong fundamentals 💪 #DevOps #Linux #Permissions #AWS #LearningJourney #30DaysChallenge