Systemd replaced traditional init on most modern Linux distributions, shifting terminology from “runlevels” to “targets.” If you’re migrating from older systems, here’s the mapping: Runlevel Systemd Target Purpose 0 poweroff.target Shutdown 1 rescue.target Single-user mode 2, 3, 4 multi-user.target Multi-user, no GUI 5 graphical.target Multi-user with GUI 6 reboot.target Reboot The two targets you’ll use…
AngularJS routing enables single-page applications by dynamically switching views based on URL patterns without full page reloads. Unlike server-side routing, AngularJS handles routing on the client, eliminating network round-trips and improving responsiveness—particularly useful when displaying different datasets based on route parameters. Install AngularJS and Dependencies Include AngularJS and the routing module. Using npm: npm install…
Open a terminal and connect to the server: ssh USER@HOST Replace USER with your username and HOST with the server’s hostname or IP address. On first connection, SSH will display the host key fingerprint: The authenticity of host ‘HOST (IP_ADDRESS)’ can’t be established. ECDSA key fingerprint is SHA256:xxxxxxxxxxxx. Are you sure you want to continue…
When you dock a laptop with an external USB keyboard, the built-in keyboard becomes a nuisance—it’s too easy to brush keys while typing and trigger unwanted input. Rather than disabling the keyboard at the BIOS level or physically disconnecting it, you can use the xinput tool to disable and re-enable it from within your Linux…
MKV files encoded with AC3 or DTS audio won’t play sound on most iOS and Android devices. These are proprietary formats with licensing restrictions—mobile players either don’t support them or refuse to decode them by default. The video plays fine, but you get silence. The solution is straightforward: re-encode the audio track to AAC or…
Blocking JavaScript per-site in Chrome lets you stop intrusive scripts, malicious content, or resource-heavy trackers without disabling JavaScript globally. This gives you surgical control—some sites work fine without JS, while others need it. Access the JavaScript exceptions page Open Chrome and navigate to this URL in the address bar: chrome://settings/contentExceptions#javascript Alternatively, go through the menu:…
The HP DesignJet 500 and similar wide-format plotters handle posters, technical drawings, and large documents well—but they require careful configuration. This guide covers printing a 24″ × 36″ PowerPoint poster on a 36″ roll, though the process generalizes to other sizes. Understanding Your Hardware Constraints The DesignJet 500 accepts roll media up to 36″ wide….
The /etc/fstab file defines how Linux mounts filesystems at boot and controls mounting behavior for both the system and individual users. Understanding its format and options is essential for reliable storage management. File Format and Fields Each line in /etc/fstab represents one filesystem. Fields are separated by whitespace (tabs or spaces), and lines beginning with…
Displaying RSS feed items on a webpage is a practical way to aggregate external content. Here’s a production-ready approach using PHP’s SimpleXML to fetch, cache, and render feeds as HTML. Basic Implementation This function handles RSS parsing with built-in caching, error handling, and output escaping: <?php function output_rss_feed($feed_url, $item_count = 10, $show_description = true, $show_pubdate…
SSD storage is standard across modern hosting providers. DreamHost and competitors have shifted entirely to SSD-backed shared hosting. The marketing claim of “200% faster page loads” deserves skepticism, but SSD-backed hosting does deliver measurable I/O improvements for realistic workloads. This post covers practical performance measurement techniques on a shared hosting account where you lack root…
Sharing internet from a Windows PC to an iPhone via USB is possible but requires careful network configuration. This is less common than tethering the other direction, but useful when you need a stable wired connection without draining your phone’s battery. Prerequisites Windows 10 or Windows 11 iPhone with iOS 12 or later USB-A to…
A toggle-on-demand terminal you can summon and hide with a single keystroke is useful for quick commands without cluttering your workspace. This guide walks you through creating one using GNOME Terminal and basic shell scripting. Prerequisites You need xdotool and wmctrl installed to manipulate windows: # Debian/Ubuntu sudo apt install xdotool wmctrl # Fedora sudo…
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….
The Linux kernel handles video mode configuration through bootloader parameters and kernel graphics drivers. Modern UEFI systems use Kernel Mode Setting (KMS) automatically, but you can override modes when needed. Legacy BIOS systems still use older mechanisms if you’re maintaining older hardware. UEFI Systems: Modern Video Mode Configuration On UEFI systems with GRUB2, add video…
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…
git merge and git rebase both integrate changes from one branch into another, but they handle history differently. Merge creates a new commit that ties together the histories of both branches. Your feature branch history remains intact, and the main branch gains a merge commit. This is safer for shared branches because it doesn’t rewrite…
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….
GNOME’s default Settings app doesn’t expose comprehensive font options, but GNOME Tweaks and command-line tools give you full control over typefaces across the desktop, shell, and window decorations. Installing GNOME Tweaks GNOME Tweaks is the easiest way to customize fonts. Install it on your system: Fedora: sudo dnf install gnome-tweaks Debian/Ubuntu: sudo apt install gnome-tweaks…
Sending email notifications when commits are pushed to a central Git repository helps teams stay coordinated and maintains audit trails. This is handled through Git hooks—scripts triggered by repository events. How Post-Receive Hooks Work When a client pushes to your Git server, the post-receive hook executes automatically. This hook lives at GIT_DIR/hooks/post-receive in your bare…