WordPress sanitizes HTML in comments by default for security. The <pre> tag is stripped unless you explicitly whitelist it. Here’s how to enable it without compromising security. Using wp_allowed_post_html Filter The proper approach is to whitelist <pre> and related tags via the wp_allowed_post_html filter: function allow_pre_in_comments( $allowed ) { $allowed[‘pre’] = array(); $allowed[‘code’] = array(…
You can fetch a webpage as if you’re requesting from a mobile device by setting curl’s User-Agent header to match a mobile browser. Remote servers use the User-Agent header to decide whether to serve mobile or desktop versions of pages. Basic syntax Use the -A (or –user-agent) flag to specify a mobile User-Agent string: curl…
Aggregating multiple RSS feeds into a single source is essential for monitoring diverse content — whether tracking news, blogs, project updates, or monitoring systems. Here are the practical approaches with working examples for 2026. Self-Hosted Feed Readers Miniflux is the modern standard for self-hosted feed aggregation. Written in Go, it’s lightweight, actively maintained, and provides…
IEEE requires a specific format for web citations, and BibTeX handles this cleanly with the @online entry type. Here’s how to get it right. IEEE Web Citation Format IEEE specifies this pattern for online sources: [#] Initial(s). Surname, “Title [Online]. Available: URL. Accessed: Month Day, Year.” A complete example looks like: [1] J. Jones, “Networks…
The replication factor determines how many copies of each data block HDFS maintains across your cluster. The default is 3, which provides adequate fault tolerance for most deployments by surviving both node and rack failures simultaneously. Setting Cluster-Wide Default Replication To set the default replication factor for all new files, add the dfs.replication property to…
Converting LaTeX to HTML while preserving figures is essential when publishing technical documentation online. The right tool depends on your document complexity and output requirements. tex4ht (htlatex) tex4ht is the most reliable option for LaTeX documents with figures, math, and complex formatting. It’s part of the TeX Live distribution and available on all major platforms….
Custom headers and footers in Apache directory listings let you add branding, instructions, or navigation without modifying the core file listing. This is useful for public file archives, download directories, or any indexed directory you want to customize. Basic Setup with .htaccess Add these directives to .htaccess in the directory where you want custom listings:…
You can use @import with media queries to conditionally load CSS files only for specific viewport sizes. This is useful for loading layout-specific stylesheets, web fonts, or icon libraries only when needed. Basic Syntax The general format is: @import url(‘path/to/file.css’) media-query; The media query parameter controls when the stylesheet loads. Here are practical examples: /*…
When your HP printer runs out of paper mid-job on Linux, the print queue pauses and won’t resume automatically once you reload paper. You need to either clear the error state physically or use CUPS commands to resume printing. Physical Reset Method The quickest approach for most HP printers is to trigger the paper-detect sensor:…
You have internal hosts on a private network (like 10.0.3.0/24) that aren’t directly accessible from your workstation. They sit behind a gateway (bastion host) like gateway.example.org. You need seamless SSH access to these internal IPs without manually hopping through the gateway each time. Using SSH ProxyJump The modern, straightforward approach is SSH’s built-in ProxyJump feature….
Tracking programming language adoption helps inform hiring decisions, tool investment, and technology strategy. Several indices measure popularity across different dimensions — job postings, GitHub activity, Stack Overflow traffic, and search trends — so no single metric tells the complete story. TIOBE Index The TIOBE Index ranks languages based on search engine results, counting hits across…
If you’re using the AddThis Welcome Bar with WordPress, you may see an unwanted gap appearing at the top of your page. This happens because AddThis injects a placeholder div that reserves vertical space: <div class=”addthis_bar_placeholder” style=”height: 46px;”></div> The 46px height creates a visible gap that disrupts your layout, especially on themes with fixed headers…
AddThis provides social sharing buttons for websites. If you’re using the AddThis Tweet button and want to add a via parameter (to attribute tweets to a specific Twitter account), here’s how to configure it. AddThis Tweet Button with via Parameter Modify the AddThis button configuration to include the tw:via attribute: <!– AddThis Tweet button with…
Broken symbolic links accumulate over time and can cause confusion or errors when scripts rely on their targets. Identifying and cleaning them up is a regular maintenance task. Basic approach Use find with the -xtype l test to locate broken symlinks: find /path/to/directory -xtype l The -xtype l flag specifically matches symbolic links that point…
Domain registration pricing has commoditized significantly over the past few years. Most registrars cluster around similar price points, and permanent discounts are increasingly rare. Rather than chasing one-off coupons that expire or have restrictive terms, understanding how registrars price domains and what you actually need will serve you better. Current Market Rates As of 2026,…
By default, WordPress contributors can submit and edit their own posts, but they can’t upload media files. If you want contributors to attach images or documents to their submissions, you’ll need to grant them the upload capability. Method 1: Using User Role Editor Plugin The User Role Editor plugin is the most straightforward approach for…
Converting LaTeX documents to HTML is useful for web publishing. Two main tools handle this conversion effectively: htlatex and latex2html. Both produce valid HTML output, though they have different strengths and limitations. Using htlatex htlatex is part of the tex4ht package and is generally more robust for modern LaTeX documents. Installation: On Fedora/RHEL: sudo dnf…
You have several options for converting HTML files to plain text, each with different strengths depending on your use case. html2text The most straightforward tool is html2text, available on most distributions: html2text input.html The converted text prints to stdout. Redirect to a file if needed: html2text input.html > output.txt Install it via your package manager:…
LightDM is a lighter alternative to GDM (GNOME Display Manager). If GDM is causing issues, you prefer a simpler login screen, or you’re running a lightweight desktop environment, here’s how to switch to LightDM on Fedora. Install LightDM sudo dnf install lightdm lightdm-gtk-greeter The lightdm-gtk-greeter provides the graphical login screen. Other greeter options include: lightdm-gtk-greeter…
When you start a VNC server with the -geometry flag under GNOME 3, you’ll notice the display resolution doesn’t match what you specified: vncserver -geometry 1024×768 This works fine with GNOME 2 and window managers like twm, but GNOME 3 ignores the setting. The actual resolution will be whatever was last used in that session,…