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“undefined” Appended to URL Causing 404 Page Not Found Error

When checking Apache HTTPD or Nginx web server access log, there are plenty of 404 Page Not Found in the access or error log caused by URLs that are been appended or added with /undefined at the [...]

No iptables / ip6tables Bootup Action Was Found at Webmin Networking in CentOS / RHEL / Fedora 7

When going to Linux Firewall module in Webmin Networking (which also used by Virtualmin and Cloudmin), the following error message is displayed: No iptables bootup action was found, indicating that the IPtables package is not installed on [...]

Change Days to Auto Empty & Delete or Disable WordPress Trash

When posts, pages, comments, images, files, portfolios, FAQs, products, items, custom post types or other elements that use WordPress built-in database structure to store the information are deleted, the items are sent to the Trash folder. The [...]

Load Contact Form 7 (CF7) JS & CSS Conditionally Only on Selected Pages

Contact Form 7 (CF7) is one of the most popular plugin for WordPress websites that supports advanced features, AJAX and plenty of customization options, and can support multiple contact forms display. When Contact Form 7 plugin is [...]

Google AdSense Yellow Background Box (Change to White / Transparent / Blank)

On web pages that are added with Google AdSense ad codes, the background color of the ads appears as yellow (or another other color), instead of white or transparent (which will show the color of web page [...]

Turn Off & Mute Facebook Video Sound AutoPlay on News Feed Scroll (Start Silently)

The era of "silent videos" or "silent movies" in Facebook is coming to an end. Videos on Facebook has so far been autoplayed with the audio and sound muted in the News Feed when you scroll to [...]

WordPress Plugin & Theme Updates Failed to Write Request To Temporary File

When updating plugins or themes in WordPress Updates, the update failed with the following error message (if you're using inline update in Plugins page, you simply get "Update Failed: Plugin update failed" error message): The update process [...]

Do Not Have Access to Webmaster Tools When Verifying Domain in Google Apps

When adding additional secondary domain or domain alias in Google Apps, you're required to verify your ownership of the domain. However, when attempting to verify the domain ownership, you may encounter the following error page: We are [...]

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