How Node.js handles massive concurrency with epoll and event-driven architecture

Hidden Gems in OS, Path & HTTP Modules Some Node.js modules are underrated but insanely useful 👇 💻 os.cpus() → see your machine’s CPU cores 🛤️ path.join() → solves Windows/Linux path bugs 🌐 http.createServer() → build a web server in 4 lines Small tricks, huge impact. 👉 Next: How Node.js scales with the Cluster module. #NodeJS #WebDevelopment #Backend #CodingTips

𝐓𝐡𝐢𝐬 𝐢𝐬 𝐰𝐡𝐲 𝐲𝐨𝐮 𝐤𝐞𝐞𝐩 𝐛𝐫𝐞𝐚𝐤𝐢𝐧𝐠 𝐋𝐢𝐧𝐮𝐱 𝐬𝐞𝐫𝐯𝐞𝐫𝐬... If you don't understand the Linux file system, you're basically blindfolded in production. Here's the map that stops you from breaking things: 📌/etc → Config central. Change how a service runs? It starts here. 📌/var → Always moving. Logs, caches, temp files. If the disk fills up, this is suspect number one. 📌 /home → User land. Everyone's personal corner. 📌 /bin & /sbin → Toolbox. Core commands like Is, grep, and cp. Once this clicked, Linux stopped being a maze and started being predictable. • Be honest, which Linux directory do you break the most? #Linux #DevOps #SystemAdministration #SRE #CloudNative #SysAdmin #DevOpsTools #OpenSource #Troubleshooting

I fact check almost everything I share here. ChatGPT happier with this than most things I’ve ran past it. 🤩👍 ⸻ Got it — let’s fact-check what’s written in the post and image about Linux directories. ⸻ ✅ Correct Points • /etc: Yes, this is where system-wide configuration files live. Modifying files here incorrectly can easily break services. • /var: Correct, it holds logs, caches, spools, and temp files that constantly change. If it fills up, it can crash services or the whole system. • /home: Correct, this is where user data and settings are stored. Losing or corrupting it can affect users directly. • /bin and /sbin: Correct, these contain essential binaries (like ls, cp, grep, etc.) and system binaries. If these break or are deleted, you may not even be able to boot or use the system properly. • /boot: Stores boot loader files (like GRUB). If broken, the system won’t start. • /dev: Correctly described — device files. • /proc and /sys: They aren’t real files but virtual filesystems exposing kernel and system info. • /lib: Correct, holds shared libraries required by binaries. • /mnt and /media: Used for mounted filesystems (temporary or external media). • /opt: For optional software. • /run: Temporary runtime data, created fresh at boot. • /tmp: Temporary files, usually cleared at boot. • /usr: Correct, stores userland programs, resources, and documentation. ⸻ ⚠️ Slightly Misleading / Needs Clarification • “If the disk fills up, /var is suspect number one” → Often true, but not the only culprit. /tmp, /home, or even log rotation failures can also cause this. • /bin & /sbin: On modern Linux (systemd-based distros like Ubuntu 20.04+), /bin and /sbin are often symlinks into /usr/bin and /usr/sbin. The description is still correct conceptually, but the file hierarchy is evolving. • /srv: The image says “site-specific data served by this system” — this is true, but in practice it’s rarely used by many distros unless you explicitly configure it for web/ftp data. ⸻ ❌ Missing or Oversimplified • /root: Mentioned as “Home Directory for root user.” True, but worth noting it’s different from / (the system root). • /lost+found: Not mentioned — each partition has one, used by fsck to recover corrupted files. • SystemD tmpfs dirs (/run, /tmp, /var/run): The map simplifies this, but modern systems use tmpfs for some runtime dirs. ⸻ 🎯 Verdict The infographic and post are mostly accurate. They correctly highlight the most common “danger zones” (/etc, /var, /home, /bin//sbin). The only nuances are: • /bin and /sbin are often symlinked into /usr now. • Other directories like /lost+found aren’t mentioned but exist. • /srv is rarely touched in many environments. • Disk-full issues can stem from more than just /var. So yes — if someone doesn’t understand these directories, they can easily break a Linux system.

Ubuntu 25.04 now delivers full AMD SEV-SNP host support! 🔐 This makes Ubuntu the first production-grade Linux distribution to support AMD SEV-SNP from host to guest. No out-of-tree patches, no experimental builds and it all works out of the box. With host support now complementing the guest support available since Ubuntu 22.04 LTS, you can deploy confidential virtual machines (CVMs) on entirely Ubuntu-based stacks, whether in private clouds or on bare metal nodes in public clouds. AMD SEV-SNP creates hardware-enforced boundaries around each virtual machine, encrypting guest memory with per-VM keys inaccessible to host software. This lifts the trust boundary out of system software and relocates it to hardware. Host-side support will carry forward to Ubuntu 26.04 LTS, ensuring long-term support for production deployments. Ready to bring confidential computing to your data center? Read the announcement: https://lnkd.in/dUWEvt8N #OpenSource #Linux #ConfidentialComputing

NixOS 25.05 “Warbler”: A Confident Leap Forward in Declarative Linux A retrospective look at NixOS 25.05 “Warbler,” released on May 23, 2025, delivers a confident evolution of the declarative Linux distribution with thousands of new and updated packages, expanded modules, GNOME 48 integration, major kernel and compiler upgrades, and a hallmark focus on reproducibility, stability, and community-driven innovation. [...] For more facts and figures, check out the full article: https://lnkd.in/exztk65y #NixOS #Linux #OpenSource #WarblerRelease #DevOps #SysAdmin #LinuxDesktop #FOSS #Nixpkgs #DeclarativeSystems #TheDistrowriteProject

🚀 Latest Linux Updates – 2025 🚀 1️⃣ Intel Nova Lake CPU Support in Linux Kernel Linux kernel patches add early support for Intel’s next-gen Nova Lake (Family 18) processors, retiring the 20-year-old Family 6 designation. 2️⃣ Floppy Disk Driver Cleanup The long-neglected Linux floppy driver just got its first major patch in 3 years, keeping legacy support alive for a while longer. 3️⃣ Debian 13 “Trixie” Progress Debian 13 continues development with updated GNOME 47 and KDE Plasma 6.1, targeting mid-2025 release. 4️⃣ openSUSE Adaptable Linux Platform (ALP) openSUSE ALP moves forward as a modern, modular distro built for containers, cloud, and edge systems. 5️⃣ Linux Mint Debian Edition 6 Beta LMDE 6 Beta released, ensuring Mint’s continuity independent of Ubuntu, based on Debian 12 “Bookworm.” 6️⃣ Fedora 41 Development Snapshot Fedora 41 test builds highlight Wayland improvements and expanded support for AI/ML development packages. ⚡ Stay updated and keep your systems secure and efficient! #Linux #OpenSource #Kernel #Debian #Fedora #IntelNovaLake #SysAdmin

🐧 LILO vs GRUB — Old School vs Modern Linux Bootloaders Back in the 90s, if you booted Linux, chances are you used LILO (Linux Loader). It was simple: load the kernel into memory and hand over control. But it had some quirks: Every kernel update meant re-running lilo. It didn’t really understand file systems — it just stored the physical disk blocks of the kernel. Limited support for large disks. Enter GRUB (GRand Unified Bootloader) — the modern replacement: Dynamic menu for multiple kernels/distros. Can read file systems directly. Much more flexible (modules, scripting, UEFI support). 👉 Think of it like this: LILO = the old flip phone. Reliable, simple, but limited. GRUB = the modern smartphone. Full of features, but a bit more complex. 💡 Question: Do you still remember booting Linux with LILO — or are you team GRUB all the way? 🔖 Hashtags #Linux #DevOps #OpenSource #CloudComputing #CloudNative #Automation #SystemAdministration #InfrastructureAsCode #SRE #ITOperations #GRUB #LILO #TechHistory #Engineering #Innovation #CyberSecurity #Cloud #AI

𝐃𝐨𝐜𝐤𝐞𝐫 𝐈𝐧𝐬𝐭𝐚𝐥𝐥𝐚𝐭𝐢𝐨𝐧, 𝐐𝐮𝐢𝐜𝐤, 𝐂𝐥𝐞𝐚𝐫, 𝐂𝐫𝐨𝐬𝐬‑𝐎𝐒 𝐆𝐮𝐢𝐝𝐞 🚀 Ready to start building and running containers locally? Here’s the fast path, with the key requirements that trip most people up. 𝐖𝐢𝐧𝐝𝐨𝐰𝐬 (𝟏𝟎/𝟏𝟏 𝐇𝐨𝐦𝐞/𝐏𝐫𝐨) . Enable virtualization in BIOS, then install WSL2 or Hyper‑V. . Turn on “Hyper‑V” and “Containers” in “Turn Windows features on or off”. . Install Docker Desktop for Windows. . 𝐍𝐨𝐭𝐞𝐬: Windows 10 21H1+ recommended. Older versions require a VM (Docker Toolbox is deprecated). 𝐦𝐚𝐜𝐎𝐒 (𝐈𝐧𝐭𝐞𝐥 𝐨𝐫 𝐀𝐩𝐩𝐥𝐞 𝐒𝐢𝐥𝐢𝐜𝐨𝐧) . Download Docker Desktop for your chip (Intel/Apple). . 4 GB+ RAM recommended. . Install the .dmg and launch Docker Desktop. 𝐋𝐢𝐧𝐮𝐱 (𝐔𝐛𝐮𝐧𝐭𝐮/𝐃𝐞𝐛𝐢𝐚𝐧/𝐅𝐞𝐝𝐨𝐫𝐚, 𝐞𝐭𝐜.) . Ensure 64‑bit kernel, virtualization support, 4 GB+ RAM. . Install Docker Desktop for Linux or use the engine packages from your distro. . Remove any old/beta versions before installing. . 𝐕𝐞𝐫𝐢𝐟𝐲 𝐢𝐧𝐬𝐭𝐚𝐥𝐥𝐚𝐭𝐢𝐨𝐧  . 𝐝𝐨𝐜𝐤𝐞𝐫 --𝐯𝐞𝐫𝐬𝐢𝐨𝐧  . 𝐝𝐨𝐜𝐤𝐞𝐫 𝐫𝐮𝐧 𝐡𝐞𝐥𝐥𝐨-𝐰𝐨𝐫𝐥𝐝 𝐖𝐡𝐲 𝐭𝐡𝐢𝐬 𝐦𝐚𝐭𝐭𝐞𝐫𝐬: . Predictable dev environments across machines . Faster onboarding with zero “it works on my machine” . Production confidence with consistent, portable artifacts 𝐇𝐞𝐥𝐩𝐟𝐮𝐥 𝐝𝐨𝐜𝐬: - [Install Docker Desktop](https://lnkd.in/gjXMQ_KB) - [Docker Engine by distro](https://lnkd.in/gvax3wjB) #Docker #Containers #DevOps #CloudNative #CICD #SoftwareEngineering #WSL2 #HyperV #Linux #Windows #Mac #DeveloperExperience

Today I was exploring Linux and running some commands. Out of curiosity, I typed 'ps aux' and noticed something interesting — the process with PID 1. That made me wonder: what exactly is PID 1, and how does it get there? This question took me down a rabbit hole into the Linux boot process, and here’s what I discovered: 1. When you power on, BIOS/UEFI checks and initializes the hardware. 2. The bootloader (GRUB) loads the Linux kernel into memory. 3. The kernel initializes hardware and mounts the root filesystem. 4. Then comes init/systemd, which is the very first process (PID 1) — it starts all essential services. 5. Finally, the system brings you to a login screen or desktop. So, that mysterious PID 1 I saw? It’s the process that begins the user space journey after the kernel hands over control. From a single command, I ended up uncovering how Linux transforms from raw hardware into a working system. #Linux #DevOps #SysAdmin #OpenSource #SystemDesign #TechLearning #CareerInTech

Telemetry pipelines turning into an endless config puzzle? 🧩 𝗞𝗹𝗼𝘂𝗱𝗠𝗮𝘁𝗲 𝗔𝗴𝗲𝗻𝘁𝘀 cut right through that, handle setup, remote config, collector lifecycle, as they scale across Linux, Docker, Kubernetes, and Windows environments. We dug into the detailed architecture and deployment steps in our latest write-up, on how all the agent components come together. If agent rollout and real-world observability pain points ring a bell (synthetic monitoring, remote changes, actual node metrics), this could be a solid reference for your next project. Read more: https://lnkd.in/gNFSSbPy