Leveled Up Shell Scripting Skills with Functions and Strict Mode

Day 19 of #90DaysOfDevOps 💻🔥 Today I built my first real-world automation scripts using Shell Scripting. ✔ Created a log rotation script (cleanup + compression) ✔ Built a server backup script using .tar.gz ✔ Automated tasks using crontab scheduling 💡 Biggest learning: Automation isn’t just writing scripts — it’s about making systems run without manual effort. ⚡ Real-world DevOps use: These concepts are used in log management, server backups, and scheduled maintenance in production systems. From learning → to building → to automating 🚀 #DevOps #Linux #ShellScripting #Automation #Crontab #90DaysOfDevOps

Day 20 of learning and practicing DevOps 🔁 Worked on scripting project — building a log analyzer and report generator Worked on: • Reading and validating log file input • Counting errors (ERROR, Failed) using grep • Extracting critical events with line numbers • Finding top 5 recurring errors using awk, sort, uniq • Generating a structured report file • Archiving processed logs automatically Important part: Instead of manually reading logs, I built a script that analyzes everything and gives a summary in seconds. Learning today--> logs tell the story turning raw logs into useful insights. Here are my notes: https://lnkd.in/ga8xUT6U 📍 #DevOps #Linux #ShellScripting #Automation #LogAnalysis #LearningInPublic #90DaysOfDevOps #TrainWithShubham

💻 Exploring Shell Scripting: Small Commands, Big Impact Another step forward in my DevOps journey 🚀 Shell scripting is more than just writing commands — it’s about: ✔️ Automating repetitive tasks ✔️ Improving efficiency ✔️ Building scalable workflows 🔑 Key areas I worked on: • Bash scripting & execution • Variables and arguments • Control structures (if, for, while) • Automating daily tasks 💡 Why it matters? Because automation is the backbone of DevOps — saving time, reducing errors, and ensuring consistency. “The best way to predict the future is to automate it.” #ShellScripting #DevOps #Automation #Linux #ContinuousLearn

Bash Scripting for DevOps — Part 11/? Till now, I was passing values using environment variables. That worked. But I realized something. Sometimes, I don’t want to set variables separately.I just want to pass values directly when running the script. That’s where arguments come in. In Bash, we can pass values like this: ./deploy.sh staging Inside the script, we can access it using: echo "Deploying to $1 environment" Here, $1 means the first argument. So if I run: ./deploy.sh prod It becomes: Deploying to prod environment This makes scripts much more flexible. Instead of editing the script or setting variables, I can just pass what I need at runtime. This is used a lot in real DevOps workflows: • passing environment names • passing versions or tags • controlling script behavior dynamically Small change. But now the script feels more like a real tool, not just a fixed set of commands. #DevOps #BashScripting #Linux #Automation #DevOpsJourney #LearningInPublic

🚀 Day 21/90 – DevOps Learning Journey Today I created my own Shell Scripting Cheat Sheet after completing multiple hands-on scripting tasks. 🔹 What I covered • Bash basics, variables, arguments • If-else, loops, functions • File checks and logical operators • Powerful tools: grep, awk, sed, sort, uniq • Real-world one-liners for log analysis • Error handling using set -euo pipefail 💡 Key Learning Writing a cheat sheet forced me to organize concepts clearly — Now I can quickly debug scripts without searching documentation every time. This will be my go-to reference during real DevOps tasks 🚀 Consistency is building confidence day by day 💪 #90DaysOfDevOps #DevOpsKaJosh #TrainWithShubham #ShellScripting #Linux #Automation

Day 20 of #90DaysOfDevOps 💻🔥 Today I built a Log Analyzer using Bash scripting — stepping closer to real-world DevOps tasks. ✔ Processed log files using shell scripts ✔ Counted ERROR / FAILED events ✔ Extracted CRITICAL issues with line numbers ✔ Identified top error patterns ✔ Generated a summary report automatically 💡 Biggest learning: Logs are gold — understanding them helps in debugging and system reliability. ⚡ Real-world DevOps use: Log analysis is used in monitoring systems, incident debugging, and alerting pipelines. From scripts → to insights 🚀 #DevOps #Linux #ShellScripting #Automation #Logging #90DaysOfDevOps

It’s been a while since my last update on my DevOps journey with CoderCo — but I’ve been putting in the work behind the scenes. Since completing Linux Fundamentals, I’ve been diving into Bash scripting, and things are starting to click. Some of what I’ve been learning: - Writing Bash scripts to automate simple tasks - Using tools like "awk" and "grep" to process data - Understanding exit codes and error handling - Working with "set -e" and "set -u" to make scripts safer and more reliable It’s a different feeling now — less “copying commands” and more actually understanding what’s happening. Still a long way to go, but definitely seeing progress. Next focus: building small scripts and applying this in real scenarios. If anyone has beginner-friendly scripting projects or tips, I’d appreciate it. #DevOps #Linux #Bash #Automation #LearningJourney

🚀 Day 19 of #90DaysOfDevOps journey with Shubham Londhe Today, I worked on a practical DevOps-style project focused on automation and system maintenance using Bash scripting. Instead of manually managing logs and backups, I built a system that handles everything automatically. 🔧 What I built: 📁 Log Rotation Script - Compresses logs older than 7 days - Deletes archives older than 30 days 💾 Backup Script - Creates timestamped backups - Verifies backup success using size output - Maintains a 14-day retention policy ⏱ Crontab Automation - Log rotation runs daily - Backups run weekly - Health checks run every 5 minutes 🧩 Maintenance Wrapper Script - Combines all tasks into one workflow - Logs everything for easier debugging 📚 Key Learnings: - Importance of validation to avoid script failures - Using "find -mtime" for automated cleanup - Redirecting logs ("2>&1") for better troubleshooting - Understanding the power of cron jobs in real-world automation This project gave me a deeper understanding of how real systems handle logs, backups, and reliability without manual effort. Step by step, I’m becoming more confident in Linux, Bash, and DevOps fundamentals 💪 #90DaysOfDevOps #DevOpsKaJosh #Linux #BashScripting #Automation #Crontab #LearningJourney #TrainWithShubham

Day 19 of learning and practicing DevOps 🔁 Today all about building actual automation scripts Worked on: • Log rotation script to compress and clean old logs • Backup script to create timestamped archives • Scheduling jobs using crontab • Combining everything into a maintenance script Important part: Understanding why log rotation and backups matter — without them, logs can fill up disk space and break systems. learning today --> automation + scheduling Instead of manually managing logs and backups, scripts + cron can handle everything in the background. This one is actually used in production environments. Here are my notes: https://lnkd.in/gwQUKK8b 📍 #DevOps #Linux #ShellScripting #Automation #Crontab #LearningInPublic #90DaysOfDevOps #TrainWithShubham

Day 17 of #90DaysOfDevOps 💻🔥 Today I dived deeper into Shell Scripting and learned how to make scripts more powerful and practical. ✔ Practiced for & while loops ✔ Worked with command-line arguments ($1, $#, $@) ✔ Built small scripts to automate tasks ✔ Learned basic error handling 💡 Biggest learning: Using arguments makes scripts reusable and dynamic — not just static commands. ⚡ Real-world DevOps use: Shell scripts are used daily for automation, deployments, monitoring, and backups. Consistency is building confidence 🚀 #DevOps #Linux #ShellScripting #Automation #90DaysOfDevOps