Shruthi Chikkela’s Post

🚨 Most DevOps engineers use Linux daily… But many don’t fully understand its file system — and that’s a hidden gap. If you work with: ⚙️ Kubernetes ⚙️ CI/CD pipelines ⚙️ Cloud VMs Then Linux isn’t just a tool — it’s your foundation. 📂 Linux File System (Simplified): /boot → Boot files (kernel, GRUB) /etc → System configuration /home → User files /root → Root user home /opt → Third-party apps /dev → Devices as files /var → Logs & runtime data (start here for debugging) /bin → Basic commands /sbin → Admin commands /usr → Apps & libraries /proc → Process info (real-time) /sys → Hardware interface /run → Runtime data /tmp → Temporary files 📌 Bonus: /lib, /lib64 → Libraries /mnt, /media → Mount points /srv → Service data /lost+found → Recovered files 💡 Why it matters: ✔ Faster debugging (/var/log first) ✔ Better automation ✔ Stronger security handling ✔ More confidence in production 👉 Don’t just use Linux. Master it. #DevOps #Linux #CloudComputing #Kubernetes #AWS #Azure #SRE #Infrastructure #SysAdmin #TechCareers #Programming #Containers #CICD #LearningInPublic #CareerGrowth

🚨 Most DevOps engineers use Linux daily… But many don’t fully understand its file system — and that’s a hidden gap. If you work with: ⚙️ Kubernetes ⚙️ CI/CD pipelines ⚙️ Cloud VMs Then Linux isn’t just a tool — it’s your foundation. 📂 Linux File System (Simplified): /boot → Boot files (kernel, GRUB) /etc → System configuration /home → User files /root → Root user home /opt → Third-party apps /dev → Devices as files /var → Logs & runtime data (start here for debugging) /bin → Basic commands /sbin → Admin commands /usr → Apps & libraries /proc → Process info (real-time) /sys → Hardware interface /run → Runtime data /tmp → Temporary files 📌 Bonus: /lib, /lib64 → Libraries /mnt, /media → Mount points /srv → Service data /lost+found → Recovered files 💡 Why it matters: ✔ Faster debugging (/var/log first) ✔ Better automation ✔ Stronger security handling ✔ More confidence in production 👉 Don’t just use Linux. Master it. #DevOps #Linux #CloudComputing #Kubernetes #AWS #Azure #SRE #Infrastructure #SysAdmin #TechCareers #Programming #Containers #CICD #LearningInPublic #CareerGrowth

🚨 Most DevOps engineers use Linux daily… But many don’t fully understand its file system — and that’s a hidden gap. If you work with: ⚙️ Kubernetes ⚙️ CI/CD pipelines ⚙️ Cloud VMs Then Linux isn’t just a tool — it’s your foundation. 📂 Linux File System (Simplified): /boot → Boot files (kernel, GRUB) /etc → System configuration /home → User files /root → Root user home /opt → Third-party apps /dev → Devices as files /var → Logs & runtime data (start here for debugging) /bin → Basic commands /sbin → Admin commands /usr → Apps & libraries /proc → Process info (real-time) /sys → Hardware interface /run → Runtime data /tmp → Temporary files 📌 Bonus: /lib, /lib64 → Libraries /mnt, /media → Mount points /srv → Service data /lost+found → Recovered files 💡 Why it matters: ✔ Faster debugging (/var/log first) ✔ Better automation ✔ Stronger security handling ✔ More confidence in production 👉 Don’t just use Linux. Master it. #DevOps #Linux #CloudComputing #Kubernetes #AWS #Azure #SRE #Infrastructure #SysAdmin #TechCareers #Programming #Containers #CICD #LearningInPublic #CareerGrowth

🚨 Most DevOps engineers use Linux daily…............... But many don’t fully understand its file system — and that’s a hidden gap. If you work with:- ⚙️ Kubernetes ⚙️ CI/CD pipelines ⚙️ Cloud VMs Then Linux isn’t just a tool — it’s your foundation................... 📂 Linux File System (Simplified): /boot → Boot files (kernel, GRUB) /etc → System configuration /home → User files /root → Root user home /opt → Third-party apps /dev → Devices as files /var → Logs & runtime data (start here for debugging) /bin → Basic commands /sbin → Admin commands /usr → Apps & libraries /proc → Process info (real-time) /sys → Hardware interface /run → Runtime data /tmp → Temporary files 📌 Bonus: /lib, /lib64 → Libraries /mnt, /media → Mount points /srv → Service data /lost+found → Recovered files 💡 Why it matters: ✔ Faster debugging (/var/log first) ✔ Better automation ✔ Stronger security handling ✔ More confidence in production 👉 Don’t just use Linux. Master it. #DevOps #Linux #CloudComputing #Kubernetes #AWS #Azure #SRE #Infrastructure #SysAdmin #TechCareers #Programming #Containers #CICD #LearningInPublic #CareerGrowth

Linux commands every DevOps Engineer should know 🐧 Not theory. Not a tutorial. These are commands I actually use daily. ✅ Save this — you’ll thank yourself later 🔖 🖥️ File & Directory • ls -la → list all files (incl hidden) • cd - → go back to previous dir • mkdir -p → create nested dirs • rm -rf → delete folder (careful ⚠️) 🔍 Logs & Debugging (most important 👀) • tail -f app.log → live logs • grep "error" → find issues quickly • less app.log → scroll large files ⚙️ Process & Services • ps aux → check processes • top / htop → resource usage • systemctl status → service health • kill -9 → stop process 🌐 Networking • curl → test APIs • ping → check connectivity • ss -tulnp → open ports 📦 System & Disk • df -h → disk usage • du -sh * → folder sizes • free -m → memory usage After 4+ years in DevOps, I can say this: These aren’t “nice to know” commands. These are the ones you reach for when production breaks. Debugging? → tail + grep Disk issue? → df + du Service down? → systemctl Master these, and Linux stops feeling scary. What’s one command you use daily? 👇 #DevOps #Linux #SRE #CloudComputing #AWS #Engineering

🐧 Understanding the Linux Filesystem Hierarchy (FHS) A strong grasp of the Linux filesystem is fundamental for anyone working in System Administration, DevOps, or Site Reliability Engineering. Here’s a concise overview of how Linux organizes its structure and the essential tools used to navigate it effectively. 📂 Core Directory Structure / (Root): The top-level directory from which the entire filesystem branches. /bin & /sbin: Contain essential system binaries. /bin is for general users, while /sbin is primarily for administrative tasks. /etc: Stores system-wide configuration files. /home & /root: /home holds user directories; /root is the home directory for the root (administrator) user. /var: Contains variable data such as logs, caches, and application data that change frequently. /usr: Houses user applications, libraries, and shared resources. /proc & /sys: Virtual filesystems that provide runtime system and kernel information. /dev: Represents device files, enabling interaction with hardware components. 🛠 Essential Commands for Navigation & Analysis Disk Usage: df, du Device Management: lsblk, blkid Filesystem Navigation: mount, tree, find Mastering these fundamentals is essential for effectively managing Linux systems, troubleshooting issues, and supporting scalable, production-grade environments. #Linux #DevOps #SRE #SystemAdministration #CloudEngineering #InfrastructureAsCode #Automation #Kubernetes #Docker #AWS #Azure #GCP #Monitoring #Troubleshooting #ProductionSupport #OpenSource #CloudComputing

🚨 Most DevOps engineers use Linux daily… But many don’t actually understand its file system. That’s a hidden skill gap. If you're working with: ⚙️ Kubernetes ⚙️ CI/CD pipelines ⚙️ Cloud VMs Then Linux isn’t just a tool — it’s your foundation. Without understanding its structure, debugging becomes guesswork. 📁 Linux File System Hierarchy (FHS) — Simplified /boot → System startup files (kernel, GRUB) /etc → Configuration (the brain of your system) /home → User data & files /root → Root user’s home /opt → Third-party software /dev → Devices as files /var → Logs, cache, runtime data (start here for debugging) /bin → Essential commands (ls, cp, cat) /sbin → Admin/system commands /usr → Applications & shared libraries /proc → Process + kernel insights (real-time) /sys → Hardware & kernel interface /run → Runtime state (since last boot) /tmp → Temporary files (auto-cleaned often) 📌 Bonus: /lib, /lib64 → Core libraries /mnt, /media → Mount points /srv → Service data /lost+found → Recovered files 💡 Why this matters (real DevOps impact) ✔ Debug issues faster → check /var/log first ✔ Understand containers at a deeper level ✔ Write better automation scripts ✔ Handle permissions & security confidently ✔ Stay calm during production outages 💬 Quick check: If your app goes down… Which directory do you check first? 👉 Don’t just use Linux. Master it. #DevOps #Linux #CloudComputing #Kubernetes #AWS #Azure #SRE #Infrastructure #SysAdmin #TechCareers #Programming #Containers #CI_CD #LearningInPublic #CareerGrowth

Most people use Linux commands. Very few actually understand them. Here are 5 commands you should truly master: 1️⃣ grep Search text inside files 👉 Used for logs, debugging, filtering 2️⃣ awk Process and transform text 👉 Powerful for data extraction 3️⃣ sed Edit text in files 👉 Automate replacements 4️⃣ netstat / ss Check network connections 👉 Debug server issues 5️⃣ tail -f Monitor logs in real-time 👉 Essential for troubleshooting These are not just commands. They are tools for solving real problems. If you master these, you’ll think like a DevOps engineer. Most engineers ignore this level of depth. That’s why they struggle in production. Don’t just use commands. Understand them. Save this for later. Follow for daily DevOps & Cloud content. #Linux #DevOps #CloudComputing #PlatformEngineering #CareerGrowth

🚀 From Commands to Confidence: Linux Skills Every DevOps Engineer Should Know Here are some essential commands I use almost daily: 🔹 File & Directory Management ls – List files and directories cd – Navigate between directories pwd – Show current directory cp, mv, rm – Copy, move, and delete files 🔹 File Viewing & Editing cat – View file content less – Read large files efficiently nano / vim – Edit files directly in terminal 🔹 Permissions & Ownership chmod – Change file permissions chown – Change file ownership 🔹 Process Management ps – View running processes top / htop – Monitor system performance kill – Stop processes 🔹 Networking ping – Check connectivity curl – Test APIs / fetch data netstat / ss – Inspect network connections 🔹 Disk & System df -h – Disk usage du -sh – Directory size free -m – Memory usage 🔹 DevOps Power Moves grep – Search inside files/logs find – Locate files quickly tail -f – Monitor logs in real time 💡 Pro tip: Combine commands using pipes (|) to unlock serious efficiency. Linux isn't just an OS in DevOps—it's your control panel. #DevOps #Linux #CloudComputing #SRE #Automation #TechSkills

Day 19 of #90DaysOfDevOps - Log Rotation, Backup & Crontab Today I worked on a real-world Shell Scripting project where I built automation scripts 🔧 What I built: • Log Rotation Script – compress old logs & clean up storage • Backup Script – create timestamped backups automatically • Crontab Setup – schedule jobs like a real server • Maintenance Script – combined everything into one automation ⏰ Automated tasks: • Log rotation → daily at 2 AM • Backup → every Sunday at 3 AM • Health check → every 5 minutes • Full maintenance → daily at 1 AM Checkout my work: https://lnkd.in/gJkC8_5Z #90DaysOfDevOps #DevOps #Linux #ShellScripting #Automation #Cloud #AWS #LearningInPublic #BuildInPublic #DevOpsJourney #Programming #Coding #Tech #CareerGrowth #Consistency #DevOpsKaJosh #TrainWithShubham