tr Command Gotcha: Quote Ranges for Uppercase Conversion

At some point, scripts stop being about commands… and start being about data. One of the most useful patterns in Bash is reading files line by line. while IFS= read -r line That single pattern lets you:  • process logs  • parse configs  • handle real input You’re no longer just running commands… you’re working with data. #Bash #Linux #Terminal #DevOps #Programming CoderCo

Building SSHUI: A Terminal Launcher for Ansible Inventories Built a small tool to solve a problem I kept running into. Managing multiple Ansible inventory YAML files and jumping between hosts for routine work was becoming inefficient. I often needed to do simple SSH access, quick telnet tests, basic file upload/download, and quick port forwarding, but that usually meant switching between separate tools or maintaining multiple workflows. So I built SSHUI — a keyboard-driven terminal launcher for working with inventory hosts from one interface. It lets me work from inventory files directly and avoid juggling separate applications just to perform common operational tasks. Built with Python and Textual, it combines several everyday infrastructure tasks into a simpler terminal workflow. Currently it is built and tested on Windows only. If anyone tries it on Linux or other operating systems, I’d appreciate feedback and compatibility testing. GitHub: https://lnkd.in/gz3ScVvb Feedback welcome from people working with automation, Linux, or infrastructure tooling. #Python #Ansible #DevOps #Linux #OpenSource

𝗣𝗢𝗦𝗜𝗫 𝘃𝘀. 𝗕𝗮𝘀𝗵  𝗪𝗵𝘆 𝗜𝘁 𝗠𝗮𝘁𝘁𝗲𝗿𝘀  Understanding the difference between POSIX and Bash is critical for writing reliable automation. 𝗣𝗢𝗦𝗜𝗫: defined by the IEEE, is a standard that ensures shell scripts behave consistently across Unix-like systems. It focuses on portability, meaning a POSIX-compliant script can run on different environments without modification. 𝗕𝗮𝘀𝗵: developed under the GNU Project, is a powerful shell that extends POSIX with advanced features like arrays and enhanced conditionals. While these features make scripting easier, they are not always available in every environment. This distinction becomes important in real-world scenarios. Many systems such as minimal Linux distributions and containers use /bin/sh, which is often linked to lightweight shells like dash or ash, not Bash. Automation tools like Ansible also rely on /bin/sh by default. As a result, scripts written with Bash-specific syntax may work during development but fail in production. 𝗣𝗼𝗿𝘁𝗮𝗯𝗶𝗹𝗶𝘁𝘆 𝗶𝘀 𝗻𝗼𝘁 𝗮 𝗹𝗶𝗺𝗶𝘁𝗮𝘁𝗶𝗼𝗻 𝗶𝘁’𝘀 𝘄𝗵𝗮𝘁 𝗺𝗮𝗸𝗲𝘀 𝗮𝘂𝘁𝗼𝗺𝗮𝘁𝗶𝗼𝗻 𝗿𝗲𝗹𝗶𝗮𝗯𝗹𝗲. #Linux #DevOps #POSIX #Bash #Automation #Ansible

🐧 Linux From Scratch 13.0-systemd is Now Available Ever wanted to understand Linux from the ground up? Linux From Scratch (LFS) is the project that lets you build your own Linux system by compiling every package from source code. Version 13.0-systemd, released on March 5th, 2026, brings significant updates: 🔧 GCC 15.2.0 and Glibc 2.43 as the toolchain foundation 🐍 Python 3.14.3 and OpenSSL 3.6.1 (with security fixes) 🐧 Linux Kernel 6.18.10 📦 Over 80 packages updated in total This version is dedicated to Ken Moffat, editor of the project for 25 years, who passed away in June 2025. A well-deserved tribute to someone who devoted decades to the open-source community. Why Build Your Own Linux? ✅ Learn how an operating system works from the inside out ✅ Complete control over every component ✅ Minimal and optimized system tailored to your needs ✅ Full security audit of your entire system LFS isn't for everyone, but if you're a sysadmin, developer, or simply curious about the Linux world, it's an experience that transforms your understanding of the operating system. #Linux #OpenSource #LinuxFromScratch #SysAdmin #DevOps #Programming #LFS #OperatingSystems #TechCommunity #GNU #SoftwareDevelopment #SystemAdministration

🚀 Day 16 of Shell Scripting Basics Today I stepped into the world of Shell Scripting Instead of doing repetitive tasks manually, I learned how a few lines of script can handle it effortlessly. 🔹 Started with the shebang ("#!/bin/bash") — the entry point of every script 🔹 Worked with variables, echo, and user input ("read") 🔹 Built decision-making using if-else conditions 🔹 Checked file existence and handled real scenarios 🔹 Finally, created a script to check service status (like nginx/sshd) ⚡ Quick Takeaways: ✔ Always use shebang for proper execution ✔ If-else is the backbone of automation logic #90DaysOfDevOps #DevOpsKaJosh #TrainWithShubham #DevOpsJourney #ShellScripting #Linux #Automation #LearnInPublic #TechGrowth #DailyLearning #ITCareer

Hit an issue while building my file automation script. The script worked fine…until I ran it multiple times. It kept overwriting files instead of preserving data. Turns out I was using > instead of >>. Small difference, big impact: • > overwrites files • >> appends to them Fixed it and added better handling for existing files. Big takeaway: In Bash, small details can completely change behaviour. CoderCo #DevOps #BashScripting #Automation #Linux #ProblemSolving

🚀 Day 17 — Shell Scripting Today was all about making scripts smarter, reusable, and production-ready 🔹 What I worked on: Used for loops to iterate Built a while loop countdown script Learned command-line arguments ($1, $#, $@, $0) Created scripts to install packages automatically (nginx, curl, wget) Added error handling using set -e and || for safer execution Checked root privileges before running critical scripts 🔹 My favorite part: Building an auto-install script that checks if a package exists and installs only if needed — feels like real DevOps work! ⚙️ Checkout my work: https://lnkd.in/gjHHr-DS #90DaysOfDevOps #DevOpsKaJosh #TrainWithShubham #ShellScripting #Linux #Automation #DevOpsJourney #LearningInPublic #CloudComputing #Scripting #BeginnerToPro #TechGrowth

GNU Movement 💡 What if software was FREE for everyone? 📅 1983 — GNU Project Begins 👨💻 Richard Stallman started a movement. 🎯 Goal: - Free software - Freedom to use, modify, share ✔️ Built: - GCC (compiler) - Bash (shell) - Core tools ❗ But one thing was missing… 👉 The Kernel 🔥 The vision was ready… just needed execution. #GNU #OpenSource #Freedom #Linux #Tech #Developers #Innovation

𝗕𝗮𝘀𝗵 𝗲𝗻𝘃𝗶𝗿𝗼𝗻𝗺𝗲𝗻𝘁 𝘀𝗲𝘁𝘂𝗽 𝗲𝘅𝗽𝗹𝗮𝗶𝗻𝗲𝗱 𝗳𝗼𝗿 𝘀𝘆𝘀𝗮𝗱𝗺𝗶𝗻𝘀 𝗮𝗻𝗱 𝗲𝗻𝗴𝗶𝗻𝗲𝗲𝗿𝘀 https://lnkd.in/dNXw5Mat Shell configuration in Linux is often misunderstood, especially the difference between login and interactive sessions. Key points covered: Startup file execution order Role of .bashrc, .bash_profile, /etc/profile Persistent vs temporary environment variables Understanding this properly helps avoid configuration conflicts and debugging issues. #Linux #Bash #ShellScripting #DevOps #SRE #SystemAdministration #OpenSource #Engineering #LinuxAdmin #LinuxTeck

Master the Linux Command Line: The Power of Grep, Sed, and Awk. 🚀 If you work with Linux, you know that data manipulation is where the real magic happens. Understanding the "Big Three" can turn hours of manual work into seconds of automation: Grep: Your search engine for the terminal. Perfect for finding patterns and filtering through mountains of logs. Sed (Stream Editor): The master of find-and-replace. Ideal for transforming text on the fly without even opening the file. Awk: A full-blown programming language for data processing. If you need to extract columns or perform calculations, Awk is your best friend. Stop clicking and start scripting. Which one do you use the most in your workflow? 💻 #Linux #DevOps #SystemAdministration #CodingTips #Grep #Sed #Awk