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Latest posts — page 10
Kernel error: i915 0000:00:02.0: [drm] *ERROR* Atomic update failure on pipe A (start=20930 end=20931) time 663 us, min 2146, max 2159, scanline start 2108, end 2196
Frequent i915 atomic update errors in your Linux kernel logs? On Dell XPS 15 laptops with hybrid Intel–NVIDIA graphics, these messages usually point to race conditions in the Intel i915 driver. Learn what causes them, how to fix or mitigate them, and when it’s safe to simply ignore the noise.
Restricting dmesg Access – Teaching Your Kernel to Keep Secrets
Learn how kernel.dmesg_restrict protects your Linux system by limiting who can read the kernel’s ring buffer. A small setting with a big security impact — keeping sensitive kernel messages away from prying eyes.
Understanding Docker’s Default Networking Modes
Docker offers a powerful and flexible networking model that enables containers to communicate with each other, the host, and the outside world. Networking is a crucial part of containerized applications, as it allows multiple services, often running in separate containers, to collaborate.
Taming the Beast: My Journey into Unsafe Linux Kernel Performance Optimization
A deep dive into the wild side of Linux performance tuning — disabling mitigations, isolating cores, and bending the kernel to your will. This story walks you through the dangerous beauty of chasing every microsecond of speed.
Using Snap Packages in Ubuntu: Introduction to Snap and How to Install Snap Packages
Snap packages offer a more flexible and distribution-agnostic method of software installation that includes all the necessary dependencies within a single package, thus making it easier to distribute and install software across various Linux distributions.
Kernel error: systemd-udevd[660]: /usr/lib/udev/rules.d/90-alsa-restore.rules:16 GOTO="alsa_restore_std" has no matching label, ignoring. systemd-udevd[660]: /usr/lib/udev/rules.d/90-alsa-restore.rules:16 The line has no effect any more, dropping.
While exploring my kernel logs, I found a harmless but annoying error about ALSA’s restore rules. Turns out, it’s a missing label in a udev rule! Here’s what caused it, why your sound still works fine, and how to patch it manually without waiting for Ubuntu’s update.
Integrating Jenkins with a Kubernetes Cluster for CI/CD
Jenkins is one of the most widely used tools for CI/CD. Integrating Jenkins with Kubernetes allows for a more scalable, efficient, and flexible CI/CD environment, enabling organizations to automate the build, test, and deployment processes in a cloud-native way.
Writing Clean and Meaningful Commit Messages
Commit messages in Git are more than just a technical requirement; they are a form of communication between you and your collaborators (including your future self). Writing clear, descriptive commit messages can drastically improve the quality of a project’s history and make it easier to understand
Kernel Pointer Restrictions in Linux — Keeping Secrets Where They Belong
Kernel pointer restrictions protect your Linux system from leaking sensitive kernel memory addresses — a key defense against advanced exploits. In this guide, we’ll explore how kernel.kptr_restrict works, what its values mean, and how to configure it for maximum security.
Linux Boot‑to‑Login Manual
A beginner‑friendly, step‑by‑step guide from pressing the power button to the login screen – covering BIOS/UEFI, CMOS, POST, hardware detection, GRUB, the kernel, initramfs, systemd, and the display manager.
How to Set Vim as the Default Editor for Systemd on Ubuntu
Tired of nano? Learn how to make Vim your default editor in Ubuntu — for your user, for all users, and even for systemctl edit. This detailed guide covers every method, from quick commands to permanent system-wide configurations, plus troubleshooting tips.