404 error


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404 error

The HTTP error message returned to the browser by the Web server when a requested Web page is not available. The error occurs because the page no longer exists or is restricted. The 404 error can be modified by the site's Webmaster to a more user-friendly message.

Like a telephone book, a link to a Web page (URL) is static. Although software can be used to search each link on a site to ensure the target pages still exist, it cannot automatically find new addresses if the pages are no longer present. See 404, HTTP return codes, 500 error, link rot and moved to Atlanta.
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References in periodicals archive ?
Site migrations can produce many 404 errors because old URLs will cease to exist once the new website launches.
When I read your book, I kept imagining myself turning on my computerized glasses, looking at an object, and seeing a 404 Error floating in midair.
There's actually a definition for "404 Error Not Found," as well as trendy words like "churn" and guidance on whether to italicize webzines.
If you don't actually have a file, you get a 404 error. Just create a blank text file in your site's root directory and call it robots.txt.
Visitors to the Amaq website are presented with a 404 error and the website is generally unresponsive.
The URL, however, is now displaying a 404 error page that says: "The requested URL /realtime was not found on this server.
Previously, some subscribers noticed Humble Trove appearing on the main site, but when they clicked the link for it they were directed to a 404 error message.