How to monitor Linux logs live: tail, less, multitail

#Linux System Error — Text File Busy You try to modify a running script and get: > Text file busy ✅ Root Cause: File is in use by another process. 🧰 Fix: lsof | grep filename kill -9 <PID> Never edit files currently in execution — stop the process first. #Linux #Processes #CLI #DevOps #SysAdmin

I learned that compression isn’t just about saving space — it’s about saving time. In Linux, commands like tar and gzip don’t just bundle files; they make transfers faster, backups cleaner, and automation simpler. When I compressed logs and config files into a single .tar.gz, I realized how this same principle applies across DevOps — we’re always looking for ways to package complexity into something portable and efficient. Simple tools. Big leverage. That’s Linux for you. What’s your go-to command when moving files across systems? #Linux #DevOps #LearningInPublic

Tired of your Linux system feeling slow and cluttered? 🤔 A clean machine isn't just faster—it's more secure and easier to manage. Here are a few simple commands to give your Linux environment a spring clean: 🧹 Clean package cache: Use `sudo apt-get autoclean` or `sudo dnf clean all` to remove old package files. 🗑️ Remove orphans: Run `sudo apt-get autoremove` or `sudo dnf autoremove` to uninstall dependencies that are no longer needed. 📜 Manage logs: Check `/var/log` for old log files. Use `journalctl --vacuum-time=2weeks` to clear old systemd journal logs. 🧠 Free up memory: Clear your page cache, dentries, and inodes with `sudo sync && echo 3 | sudo tee /proc/sys/vm/drop_caches`. Regular maintenance keeps your system running at peak performance and prevents small issues from becoming big problems. What are your go-to commands for Linux maintenance? Share them below! 👇 #Linux #LinuxGuide #ServerManagement #SysAdmin #ITtips #ComputerTips #TechWithVelkaja #VALLUNAR #VallunarGroups #DevOps

🐧 Level Up Your Linux Game - Fast! Think you know Linux? Let’s find out. 💻 #Route2Open dropped a Free Linux Cheat Sheet loaded with must-know commands for every engineer. Here’s what’s inside: ➡️ File & system kung fu ➡️ User and permission magic ➡️ Networking & SSH wizardry ➡️ Troubleshooting tricks that actually work Perfect for newbies, pros, and caffeine-powered sysadmins alike. ☕💪 ✅ Totally free ✅ Printable ✅ Built by engineers who’ve “sudo’ed” too many times 📥 Grab yours now: 🔗 https://lnkd.in/diGW4svM #Linux #CheatSheet #SysAdmin #DevOps #OpenSource #Route2Open

🐚 Under the Shell — Day 1: The Hidden Mind of the Shell Most people think the shell just “runs commands”. But the shell doesn’t run commands — The shell is the brain that interprets your commands. When you type something like: echo $HOME/*.txt Linux doesn’t see this command the way you typed it. Before sending it to the kernel, the shell secretly performs a series of transformations: 🔹 Variable expansion 🔹 Pathname expansion 🔹 Word splitting 🔹 And finally, execution Miss one step — and your command behaves completely differently. Ever wondered why echo "$HOME/*.txt" and echo $HOME/*.txt give different results? That’s shell expansion at work — the invisible logic most people never notice. And here’s another one: $(command) actually runs in a sub-shell — a new shell instance inside your current one! That’s why environment variables you set inside it don’t persist afterward. So next time you run a command, remember — the shell is not a messenger. It’s a mind that rewrites your command before Linux even sees it. #Linux #SysAdmin #DevOps #RHCSA #Bash #ShellScripting #LearningInPublic #UnderTheShell

꧁༺ 𝕋𝕙𝕖 𝕆𝕧𝕖𝕣𝕋𝕙𝕖𝕎𝕚𝕣𝕖 𝔹𝕒𝕟𝕕𝕚𝕥 𝔾𝕒𝕞𝕖 𝕚𝕤 𝕥𝕙𝕖 𝕓𝕖𝕤𝕥 𝕨𝕒𝕪 𝕥𝕠 𝕤𝕙𝕒𝕣𝕡𝕖𝕟 𝕪𝕠𝕦𝕣 𝕝𝕚𝕟𝕦𝕩 𝕤𝕜𝕚𝕝𝕝𝕤 ༻꧂ By Playing The OverTheWire Bandit Game it challenges you with real world linux concepts such as navigating directories , managing files , using permissions and reading hidden data. It helps you move from theory to real raw practice turning what you learn from linux tutorials online into hands on problem solving experience and as you move on futher above levels you will discover and learn many more commands which will sharpen your linux skills. I’ve attached my GitHub in the Featured section—check out how I tackled levels 0–12 of the OverTheWire Bandit game and documented all the commands I used! #Linux #DevOps #CoderCo #OverTheWire #Bandit

🐧 Linux terminal users, I'm delighted to introduce MyLinuxHelper - an open-source toolkit I've been working on! 🚀 I built this to solve everyday Linux workflow challenges: 🐳 Single command creates temporary isolated environments - test anything safely 🐳 Enter Docker containers instantly by name pattern - no more copying container IDs 📁 Instant directory navigation - bookmark any folder and jump back with a number or name 🔍 Fast file search across your entire project 📄 JSON validation and intelligent search 📜 Enhanced command history with timestamps One-command installation, zero configuration. Built with 293 tests for reliability. Check it out and let me know what you think! ⭐ https://lnkd.in/dmAgczP3 #Linux #OpenSource #DevTools #ShellScripting #DeveloperTools #DevOps #SysAdmin

Do you also scroll through your command history trying to remember how you set something up or to share the steps with your teammates?? Yeah… me too 😅 But I just learned a Linux trick recently that changed everything. You can record your entire terminal session with all thecommands, output and everything without installing anything. Just run “script demo.txt” Then run you commands, debug, install, setup. When you are done, type “exit” Now the whole session is saved in a single text file including the commands and their output. Perfect for debugging, writing documentation, sharing setup steps with teammates. And yes you can replay it later like a movie “scriptreplay demo.txt” Isn’t it awesome ?! Wish I knew this earlier 😭 #Linux #DevOps #SysAdmin #CommandLine #TechTips #Productivity #LinuxTips

Learning Linux Through Games — My Take on OverTheWire Bandit 🎮 The first 12 levels are officially completed and uploaded to my GitHub. What did I learn? Not every command needs to be memorized before tackling a problem — it’s the mindset that matters. Combining a problem-solving approach with on-the-go research is what really moves the needle., after all, you can’t remember everything!!! If you’ve learned the basics of Linux and are looking for somewhere to test your knowledge and application, this game is a great place to start🎯 #Linux #DevOps #OverTheWire #ProblemSolving #ContinuousLearning #LearningInPublic

The Linux Foundation just released on YouTube the yearly talk with Mr. Torvalds, which is essentially the only time he speaks in public during the year. As someone who burns with passion for software and product, I always find it very educational to watch. The concept that caught my attention most in this talk is transcribed below. I cannot stress enough that building "boring code" is one of the most intelligent practices you can enforce as a software architect, because boring means: stable, predictable, deterministic, easy to maintain and easy to expand. Moreover, being able to say "No" helps tremendously in creating software that grows organically and in preventing enthusiasm spikes from turning into impulsive technical decisions. "If I look at the process, we have had a very consistent process in the Linux kernel development for 15 years now. And one of the things that's so interesting is that to the press, this is too boring. [...] I used to say that my job is often to say no that people come and uh have some radical new idea that maybe it's really interesting but at the same time it it sounds like a maintenance nightmare and I go No, you go off, you prove this new feature in your own sandbox and you do this and then you come back with numbers and show that I was wrong." #linux #softwarearchitecture #development #productmanagement https://lnkd.in/d4F5gS9X