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📅 2026-06-23 | 📂 Linux
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404 NOT FOUND!

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The 404 page is an essential part of any website, carrying significant responsibility for user experience and SEO optimization. A 404 error occurs when a user visits a page on the site that does not exist or has been deleted, and the server returns a 404 status code. If the webmaster hasn't set up a custom 404 page, dead links may appear, which can negatively impact search engine indexing when crawlers access such URLs.

Origin of 404 Not Found

Legend has it that before the Third Industrial Revolution, the form of the Internet was a large central database located in Room 404. At that time, all requests were manually processed by humans. If the requested file wasn't found in the database or if the requester had written down the wrong file number, users would receive a message: room 404 : file not found. After the rise of the modern Internet, people became accustomed to using 404 as the error code indicating that the server could not locate the requested file. Of course, historical verification shows that the legendary Room 404 never actually existed.

Two Major Benefits of Setting Up a 404 Page

  • Guide users not to close the website, enhancing user experience.
  • Prevent the appearance of dead links on the website.

See more about HTTP Status Codes Introduction.

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