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…
Thunderbird’s adaptive junk filter can effectively reduce spam once configured and trained, but it doesn’t automatically move flagged messages by default. Here’s how to set it up properly. Enable automatic movement for incoming mail Access your account settings: Linux/Windows: Edit → Account Settings macOS: Thunderbird → Settings → Accounts Select your email account and click…
When a Bash script needs to reference its own location — for sourcing additional files, logging, or managing relative paths — $0 seems like the obvious choice. But it’s a trap: $0 behaves differently depending on whether your script is executed directly or sourced. The Problem with $0 When you execute a script directly: ./script.sh…
NetworkManager is the default network management tool on modern Fedora, RHEL, and CentOS systems. You can configure static IPs either through the CLI or by editing configuration files directly. This guide covers both approaches for Fedora 41+ and RHEL 9+. Identify your network interface Start by listing all available network interfaces: ip link show or…
Running commands across multiple servers is fundamental to cluster management and infrastructure automation. While orchestration tools like Ansible and Terraform dominate modern deployments, sometimes you need lightweight solutions that work without dependencies—or you’re already invested in SSH-based infrastructure. When managing clusters, you typically work in two modes: serial execution (one node at a time) and…
Firefox on Linux Mint doesn’t include Google in its default search engine list. Linux Mint deliberately curates search engines based on revenue-sharing agreements — only search engines that share ad revenue with Linux Mint appear by default. Google doesn’t participate in this arrangement, so you need to add it manually if you prefer it over…
Before writing code, get comfortable with fundamental Linux commands. You’ll use these daily: File operations: ls, cd, cat, less Text search: grep, ripgrep (rg) Remote access: ssh, scp, rsync Session management: tmux or screen for persistent terminal sessions Shell: bash (default on most distributions), though zsh and fish are popular alternatives Start with built-in documentation….
Install AWS CLI v2 through your system’s package manager for production deployments. On Debian/Ubuntu: sudo apt-get update sudo apt-get install awscli On RHEL/CentOS/Fedora: sudo dnf install awscli Or use the official installer directly: curl “https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip” -o “awscli-v2.zip” unzip awscli-v2.zip sudo ./aws/install Verify installation: aws –version Configure AWS CLI credentials Set up credentials interactively: aws configure…
Parsing RSS feeds in PHP remains a common requirement for content aggregation. This guide covers practical patterns for fetching feeds, caching results, extracting content, and sanitizing output — with implementations that work reliably in production. Basic RSS Feed Parsing PHP’s SimpleXML extension provides a straightforward way to parse RSS feeds: <?php $feed_url = ‘https://example.com/feed.xml’; $feed…
PowerPoint exports slides at 96 DPI by default, which is too low for professional printing. Print shops typically require 150 DPI for acceptable quality or 300 DPI for high-quality output. The UI export options in PowerPoint don’t reliably control the actual output DPI—you need to change a registry setting on Windows or use alternative methods…
Flash is dead on the web. Adobe ended support on December 31, 2020, and all modern browsers removed plugin support years ago. If you need to view Flash content in 2026, you have two practical options: the Ruffle emulator or running legacy applications in isolated environments. Why Fresh Player Plugin and PPAPI Don’t Work Anymore…
SSH connections dropping during idle periods is a persistent issue in production environments. Both client and server configurations provide built-in keep-alive mechanisms designed specifically for this problem. Stop running while true; do uptime; sleep 30; done — there are proper solutions. Client-side configuration Per-user SSH config Add to ~/.ssh/config: Host * ServerAliveInterval 60 ServerAliveCountMax 3…
When verifying file integrity on Linux, you’ll typically reach for one of several checksum utilities. A natural question: which one is fastest? The answer depends heavily on whether I/O or CPU is your bottleneck. Disk I/O Dominates on Most Systems In realistic scenarios with typical storage, disk I/O is almost always the limiting factor. Test…
Watching for filesystem changes and triggering actions is essential for development workflows—recompiling after source edits, restarting services when configs update, or running tests during coding. Linux’s inotify subsystem provides kernel-level file monitoring, and inotifywait makes it accessible from the command line. Installation Install inotify-tools on your system: Fedora/RHEL/CentOS: sudo dnf install inotify-tools Debian/Ubuntu: sudo apt…
Configuring an HP all-in-one printer’s scanner on Linux requires HPLIP (HP Linux Imaging and Printing) for device support and SANE (Scanner Access Now Easy) for scanning functionality. The main gotcha is that a working printer doesn’t guarantee a working scanner — they use different subsystems and need separate configuration. Installing Required Packages Start by installing…
When you repurpose disks from one RAID array to another system, Linux keeps the old RAID metadata intact as a safety measure. This prevents accidental data corruption, but it also blocks you from reusing the disk until the signatures are cleared. RAID metadata isn’t stored in one place — it’s scattered across the disk by…
GRUB2 configuration needs to be regenerated when you modify boot parameters, install new kernels, or adjust default boot entries. The process varies slightly between BIOS and UEFI systems, and between distributions, but follows a consistent pattern once you understand your system layout. Check Your System Firmware Type Before regenerating config, identify whether your system uses…
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…
When writing to disk, you need to know if space is available — especially in systems software, daemons, and critical applications. The POSIX statvfs() call provides filesystem statistics across all POSIX systems, making it more reliable than Linux-specific alternatives like statfs(). The statvfs() API Include the required header: #include <sys/statvfs.h> Function signature: int statvfs(const char…
Vim is generally fast, but dozens of plugins can create noticeable slowdowns. Since Vim’s core remains single-threaded, any blocking operation in a loaded plugin will freeze your editor until it completes. Rather than disable plugins randomly, use Vim’s built-in profiling tools to identify the actual culprit. Profile Vim Startup Time The fastest way to find…