Chrome on Linux uses NSS (Network Security Services) for certificate management. Install the certutil utility from your distribution: Debian/Ubuntu/Linux Mint: sudo apt install libnss3-tools CentOS/Fedora/RHEL: sudo dnf install nss-tools Arch Linux: sudo pacman -S nss Extract and Import the Certificate The most reliable approach is to extract the certificate directly from the server and import…
Playing video files stored on a remote server without downloading them locally is practical with modern tools. Whether you’re accessing a home NAS, media server, or remote workstation, SSH combined with a media player gives you several approaches depending on network conditions and your use case. We’ll assume a file located at ~/movie.mp4 on user@example.org….
Hadoop 2.x reached end-of-life in 2016. This guide covers setup for learning purposes and legacy system maintenance only. For production deployments, use Hadoop 3.x or later, which includes performance improvements, better YARN scheduling, HDFS erasure coding, and improved security. Cloud-managed options like AWS EMR, Google Dataproc, and Azure HDInsight eliminate most operational overhead. This guide…
Fedora’s default font rendering works but benefits significantly from installing current font versions and tuning fontconfig. This guide covers practical font configuration using only free software and fonts available in standard repositories. Installing fonts Fedora ships with Liberation fonts, but ensuring you have version 2.x (which renders substantially better than 1.x) is the first step….
WordPress performance depends on three complementary caching layers: PHP bytecode caching (OPcache), page caching (WP Super Cache), and asset optimization (Autoptimize). Combined properly, they’ll cut your Time to First Byte in half and significantly improve Core Web Vitals. Enable OPcache in PHP OPcache caches compiled PHP bytecode in shared memory, eliminating parse and compile overhead…
Fedora is a cutting-edge distribution sponsored by Red Hat that serves as a testing ground for technologies eventually stabilized in RHEL. This guide covers essential infrastructure, system administration, and desktop tools for modern Fedora systems, with practical installation and usage examples. Desktop Environment Setup GNOME Configuration Modern GNOME desktops (GNOME 40+) use dconf for configuration,…
Self-hosting a photo gallery gives you control over your content. If you want to skip database management entirely, a handful of PHP solutions still work—though most are unmaintained. This post covers what’s still functional, where the limits are, and when you should choose something else instead. Static File-Based Gallery Scripts Single File PHP Gallery Status:…
Choosing the right cloud storage service requires understanding how each platform handles data consistency. This post covers the current consistency guarantees from the three major providers and how they affect your application design. Amazon S3 S3 is a key-based object store built for Internet-scale workloads. The consistency model is now straightforward across all operations. S3…
RAID0 (striping) on enterprise RAID controllers like Broadcom MegaRAID is used to expose multiple disks as a single logical volume with no redundancy. This configuration is appropriate only for performance-critical workloads where data loss from a single disk failure is acceptable, or for temporary/cache storage. This guide covers the full setup process on servers with…
This guide sets up OpenLDAP for centralized authentication and NFS with automount to provide unified home directories across a cluster. The setup uses modern OpenLDAP backends and current NFS4 best practices. System Environment Server: LDAP and NFS: 10.0.0.2, Fedora 41 x86_64 Base DN: dc=lgcpu1 Clients: Range: 10.0.0.1/24, Fedora 41 x86_64 LDAP Server Setup Package Installation…
Jeff Dean’s foundational work on large-scale distributed systems at Google established performance metrics that remain essential for making sound architectural decisions. While absolute numbers shift with hardware advances, the relative orders of magnitude have proven remarkably stable. These latency figures represent the raw cost of fundamental operations. Understanding them prevents decisions that seem reasonable in…
MediaWiki stores its main page configuration in the MediaWiki:Mainpage system message. By default, this points to “Main Page”, but you can change it to any title that suits your wiki’s purpose. This process involves updating the system message, creating your new homepage, and handling redirects properly to avoid breaking external links and SEO. Step 1:…
MediaWiki’s sidebar is managed through the MediaWiki:Sidebar special page, a simple text-based system that controls navigation for your entire wiki. Changes take effect immediately across all pages. Accessing the Sidebar Configuration Navigate to the sidebar editor using one of these methods: Direct URL (replace example.com with your domain): With pretty URLs: https://example.com/w/MediaWiki:Sidebar Without pretty URLs:…
Modern MediaWiki installations should prioritize responsive design, but you may still need explicit device-based skin switching for specific use cases. This guide covers both approaches and how to implement them correctly. Responsive Skins: The Recommended Approach The default solution is using a responsive skin that adapts automatically to screen size without separate configuration. Vector 2022…
MediaWiki’s default URL structure — www.example.com/w/index.php?title=TITLE — works functionally but creates poor SEO signals and awkward shareable links. Clean URLs like www.example.com/w/TITLE improve search visibility, readability, and user experience while making pages easier to reference. LocalSettings.php Configuration Open LocalSettings.php in your MediaWiki root directory and add these settings: $wgScript = “/w/index.php”; $wgArticlePath = “/w/$1”; The…
rclone is the modern standard for mounting Google Drive on Linux — it’s actively maintained, handles authentication reliably, and works across distributions without compilation. Install rclone Most distributions package rclone. Install via your package manager: # Debian/Ubuntu sudo apt install rclone # Fedora/RHEL sudo dnf install rclone # Arch sudo pacman -S rclone Or install…
Thunderbird’s most powerful settings live outside the UI—buried in the config editor or preferences file. This guide covers setting emails to sort newest-first by default and enabling inline quoting for replies, two changes that significantly improve daily usability. Accessing the Config Editor Open the config editor at Edit → Preferences → Advanced → Config Editor,…
x86-64 (Intel 64, AMD64) is the dominant 64-bit instruction set architecture for consumer and enterprise computing. Whether you’re reverse-engineering binaries, writing performance-critical code, or understanding system internals, a solid grasp of x86-64 assembly is essential. Learning Foundations CMU’s Introduction to Computer Systems (15-213) course materials remain the gold standard for foundational machine-level programming. The accompanying…
Java Applets were obsolete by 2016 and removed from Java 9+. If you need a browser-based system monitoring dashboard, use WebSockets or Server-Sent Events paired with modern JavaScript charting libraries. WebSocket + Python Backend Architecture The most practical setup streams metrics from a Python backend to connected clients using WebSockets. Clients render real-time charts without…
Understanding tradeoffs between these structures is essential for algorithm design: Memory allocation: Arrays use contiguous memory (better cache locality); linked lists scatter across memory with pointer references Access time: Array O(1) random access; linked list O(n) traversal required Insertion/deletion: Arrays require O(n) shifts; linked lists require O(1) pointer updates when position is known Size: Arrays…