WordPress automatically generates archive pages, category listings, tag pages, and author archives. While these pages serve users browsing your site, they often contain duplicate or thin content that clutters search results. The noindex meta tag prevents search engines from indexing these secondary pages while still allowing them to crawl and follow links. How noindex Works…
WordPress generates excerpts by default using the first 55 words of post content. You can override this globally or per-post type by adding filters to your theme or a must-use plugin. Basic excerpt length filter Add this to wp-content/themes/your-theme/functions.php: function custom_excerpt_length( $length ) { return 35; } add_filter( ‘excerpt_length’, ‘custom_excerpt_length’ ); Replace 35 with your…
Consolidating categories, archives, and post listings into a dedicated page keeps your WordPress site structure clean and prevents search engines from treating navigation elements as content. Rather than scattering these across sidebar widgets, a dedicated archives page improves both user navigation and SEO by creating a single destination for content discovery. Create the Custom Page…
Moving a domain requires more than DNS changes. If you have existing traffic, backlinks, or search engine indexing pointing to your old domain, a proper 301 redirect ensures users and search engines find your content at the new location while preserving SEO rankings. Why 301 Redirects Matter A 301 (“Moved Permanently”) response tells browsers and…
By default, WordPress displays full post content on index, category, tag, archive, and search pages. This duplicates content across multiple URLs, dilutes SEO value, slows page rendering, and forces readers to scroll through complete posts when they’re just scanning headlines. Using excerpts instead improves page load times, reduces crawl budget waste, consolidates ranking signals to…
Apache’s default 404 error page is generic and often displays hosting provider branding. Customizing it gives you control over the user experience when they land on missing pages. The same applies to other HTTP error responses like 403 Forbidden or 500 Internal Server Error. Apache: Using ErrorDocument Directive The ErrorDocument directive in Apache accepts two…
The <meta> refresh tag provides a client-side redirect mechanism when server-side options aren’t available. While inferior to HTTP redirects for SEO and performance, it serves legitimate use cases: static hosting environments without backend access, transition screens for deprecated pages, or temporary migration notices. Basic Syntax <meta http-equiv=”refresh” content=”delay; url=destination”> The content attribute contains two parts:…
Insert the installation media and create a mount point: sudo mkdir -p /media/dvd sudo mount /dev/sr0 /media/dvd For a DVD image file instead of physical media: sudo mount -o loop /path/to/image.iso /media/dvd Verify the mount and check that packages exist: ls /media/dvd/Packages/ | head On systems with automatic mounting (systemd-based), the DVD may already be…
When managing multiple servers, you need reliable ways to verify which hosts are reachable. While orchestration tools like Kubernetes and Ansible handle monitoring at scale, a lightweight Bash script works well for quick spot checks, operational tasks, or smaller deployments. Basic ICMP Reachability Check The simplest approach uses ping to test ICMP reachability: ping -W…
Running the same command across dozens of servers is a routine task in infrastructure work. Whether you’re checking disk usage, deploying updates, or gathering system metrics, doing this manually wastes time and introduces errors. The straightforward approach: iterate through a list of hosts and execute commands via SSH on each one. Basic Shell Loop Approach…
When managing Xen Dom0 hosts, shutting down guest VMs (DomUs) before powering off the physical server is essential to prevent data loss and filesystem corruption. Modern Xen distributions (including Citrix Hypervisor and AWS infrastructure) still rely on this principle, though the tooling has evolved. Using xl for VM Shutdown Current Xen installations use xl rather…
Scala runs on the Java Virtual Machine, so you’ll need Java 11 or later installed first. Check your current version: java -version If you don’t have Java installed, install it through your distribution’s package manager or use a tool like SDKMAN. Installing via SDKMAN (Recommended) SDKMAN is the most reliable way to manage Scala and…
Emacs provides a built-in tutorial. Access it with: C-h t For structured learning, the GNU Emacs Manual (built-in via C-h i) is the most authoritative resource. The Emacs Wiki also maintains community-driven guides and examples. Emacs configuration Store your configuration in ~/.emacs.d/init.el rather than the legacy ~/.emacs file. This keeps your Emacs directory cleaner and…
The mupdf package is available in most major Linux distributions. On RHEL/CentOS/Fedora: sudo dnf install mupdf mupdf-tools On Debian/Ubuntu: sudo apt install mupdf On Arch: sudo pacman -S mupdf mupdf is a lightweight, fast PDF and XPS viewer written in C. It’s significantly faster than heavier alternatives like Evince or Okular, making it ideal for…
The diff utility generates unified diffs that show changes between file versions. Always use the -u flag to create unified diffs, which are the standard format for patches. For a single file: diff -u original.c new.c > fix.patch For an entire directory tree: diff -rupN original/ new/ > patchfile.patch The flags break down as: -r:…
Qt and GTK applications often use different cursor themes, which creates visual inconsistency across your desktop. This mismatch is common in mixed-DE environments where Qt applications (like VLC, KeePass, or Telegram) inherit the wrong cursor style from system defaults. How Qt finds cursor themes Qt applications read cursor configuration from ~/.icons/default/index.theme. This file specifies which…
The startx command launches an X session without a display manager, reading configuration from $HOME/.xinitrc. By default, this file doesn’t exist—startx falls back to system defaults that typically only recognize GNOME or KDE. If you’ve installed MATE and want to use it with startx, you need to create a user-level configuration. Understanding startx Initialization When…
Fedora switched to systemd for service management years ago, replacing the traditional /etc/inittab file with a target-based system. While systemctl set-default is the standard approach, understanding the manual method gives you insight into how systemd actually manages boot targets. Systemd Targets vs. Legacy Runlevels Systemd uses targets instead of runlevels. The two primary targets you’ll…
Modern Fedora (29+) uses firewalld by default instead of the legacy iptables service. If you’re working with an older system or one configured for iptables, the concepts here still apply, but you should first check what’s actually managing your firewall: systemctl status firewalld systemctl status iptables If firewalld is active, use firewall-cmd instead. For iptables-based…
Xen remains in production use across cloud providers (AWS EC2, Citrix Hypervisor) and large infrastructure deployments, though KVM has become the default hypervisor for most Linux distributions. This guide covers installing a Fedora Domain-U on a Xen Dom0 using PXE boot, applicable to current Fedora releases. Prerequisites A working Xen Dom0 installation LVM backing store…