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.The 404 or Not Found error message is an HTTP standard response code indicating that the client was able to communicate with the server but the server could not find what was requested.^ Http Code : 404 .

 ^ The 404 error message is displayed when a… .
  • scriptygoddess » Blog Archive » 404 redirects 11 January 2010 20:19 UTC www.scriptygoddess.com [Source type: General]

 ^ TOPIC: error 404 message page not found .
  • Re:error 404 message page not found - RSJoomla! Forum 10 February 2010 10:35 UTC www.rsjoomla.com [Source type: General]

 .404 errors should not be confused with "server not found" or similar errors, in which a connection to the destination server could not be made at all.^ It should show me a custommade 404-error.
  • CMS Made Simple Forum: Blank 404 error page after upgrade 10 February 2010 10:35 UTC forum.cmsmadesimple.org [Source type: FILTERED WITH BAYES]

 ^ I am getting 404 not found error.
  • MVC application not working on localhost - 404 error - ASP.NET Forums 19 January 2010 8:47 UTC forums.asp.net [Source type: FILTERED WITH BAYES]

 ^ When you get the 404 error, what is the page that can't be found.
  • Milonic JavaScript Menu • View topic - Strange 404 error 19 January 2010 8:47 UTC www.milonic.com [Source type: General]

 .Another similar error is "410: Gone", which indicates that the requested resource has been intentionally removed and will not be available again.^ Sample 410 Gone Indicates that the resource requested is no longer available and will not be available again.
  • HTTP Status Codes and .htaccess ErrorDocuments 11 January 2010 20:19 UTC www.askapache.com [Source type: FILTERED WITH BAYES]

 ^ When I try to hit Crowd, I get an apache tomcat error: HTTP Status 404 - /crowd/ type Status report message /crowd/ description The requested resource (/crowd/) is not available.
  • Atlassian Forums: 404 error trying to access crowd ... 10 February 2010 10:35 UTC forums.atlassian.com [Source type: FILTERED WITH BAYES]

 ^ I have been able to run apt-get update and not get the 404 error but when I go to install qgis I get the following different error: Code: Select all Package qgis is not available, but is referred to by another package.
  • Quantum GIS Forum • View topic - 404 error with lenny repo 10 February 2010 10:35 UTC forum.qgis.org [Source type: General]

 .A 404 error indicates that the requested resource may be available in the future.^ Request specific 404 errors .
  • A List Apart: Comments: The Perfect 404 11 January 2010 20:19 UTC www.alistapart.com [Source type: General]

 ^ Re: 404 error requesting calender .
  • Zarafa Forums • View topic - 404 error requesting calender 10 February 2010 10:35 UTC forums.zarafa.com [Source type: FILTERED WITH BAYES]

 ^ Sample 404 Not Found The requested resource could not be found but may be available again in the future.
  • HTTP Status Codes and .htaccess ErrorDocuments 11 January 2010 20:19 UTC www.askapache.com [Source type: FILTERED WITH BAYES]

Contents

Overview

.When communicating via HTTP, a server is required to respond to a request, such as a web browser's request for an HTML document (web page), with a numeric response code and an optional, mandatory, or disallowed (based upon the status code) message.^ When a request is made for a page on your site, the server returns an HTTP status code in response to the request.
  • Joomla- cutomizing Custom error (404) pages : Free Joomla Resources 10 February 2010 10:35 UTC blog.technointellects.com [Source type: General]

 ^ HTTP status code.
  • History of 404 11 January 2010 20:19 UTC www.plinko.net [Source type: General]

 ^ HTTP status codes .
  • HTTP status codes - Webmasters/Site owners Help 11 January 2010 20:19 UTC www.google.com [Source type: General]

 .In the code 404, the first "4" indicates a client error, such as a mistyped URL.^ Tracking code for the 404 error page .
  • Tracking code for the 404 error page - Search Engine Watch Forums 19 January 2010 8:47 UTC forums.searchenginewatch.com [Source type: FILTERED WITH BAYES]

 ^ A description of the 404 error code and what it means .

 ^ IIS HTTP Error Code: 404 .
  • IIS HTTP Error Code: 404 - Vista Forums 11 January 2010 20:19 UTC www.vistax64.com [Source type: FILTERED WITH BAYES]

 .The following two digits indicate the specific error encountered.^ The most common reasons you may encounter a 404 error on a website are as follows: .
  • 404 error page « Web Hosting Blog | Heart Internet Official Blog 10 February 2010 10:35 UTC www.heartinternet.co.uk [Source type: General]

 ^ The last digit, 4 refers to a specific error in the group of 40x.

 ^ The middle digit, 0 represents a general syntax error and could indicate a spelling mistake.

 .HTTP's use of three-digit codes is similar to the use of such codes in earlier protocols such as FTP and NNTP.^ Here's mine: http://www.mulewagon.com/404 Okay, so I can't use the featured product code with the inherited template on a custom page...

 ^ The easiest, fastest and safest way to get rid of Http 404 errors is to use a highly-effective Windows registry cleaner such as RegCure ™ .
  • Repair Http 404 Errors Instantly 11 January 2010 20:19 UTC www.pcerrorfix.net [Source type: General]

 ^ As an example, if we wanted to create a link that showed the text Bright Hub and directed the reader to http://www.brighthub.com, we would use the following code.
  • How Do I Add a HTML Link? Creating Hyperlinks with HTML Code 19 January 2010 8:47 UTC www.brighthub.com [Source type: General]
.At the HTTP level, a 404 response code is followed by a human-readable "reason phrase". The HTTP specification suggests the phrase "Not Found"[1] and many web servers by default issue an HTML page that includes both the 404 code and the "Not Found" phrase.^ Http Code : 404 .

 ^ But after running it, I got the page with HTTP Status 404 on it.
  • Ericsson: HTTP Status 404, on SailFin 11 January 2010 20:19 UTC www.ericsson.com [Source type: General]

 ^ A 404 error is essentially a response from a web server when it is unable to locate a page that has been requested.
  • 25 Creative 404 Error Page Designs | Voosh Themes 10 February 2010 10:35 UTC www.vooshthemes.com [Source type: General]
.A 404 error is often returned when pages have been moved or deleted.^ Log-out Error 404 page .
  • 404 Error after upload - PhotoPost Community 10 February 2010 10:35 UTC www.photopost.com [Source type: General]

 ^ Custom 404 error page - redirecting pages .
  • Custom 404 error page - redirecting pages - Administration and Configuration - DotNetNuke 19 January 2010 8:47 UTC www.dotnetnuke.com [Source type: General]

 ^ Rare 404 Error Page Designs .
  • 12 Rare 404 Error Page Designs 10 February 2010 10:35 UTC digg.com [Source type: FILTERED WITH BAYES]

 .In the first case, a better response is to return a 301 Moved Permanently response, which can be configured in most server configuration files, or through URL rewriting; in the second case, a 410 Gone should be returned.^ File not found - requested URL not found on this server .

 ^ If the page is moving permanently you should use a 301 redirect.
  • How To Manage Broken Links & 404 Error Pages « The Gravytrain Blog – SEO, PPC, Web Design, Social Media & Marketing 19 January 2010 8:47 UTC www.gravytrain.co.uk [Source type: General]
  • 404 Error Pages « The Gravytrain Blog – SEO, PPC, Web Design, Social Media & Marketing 19 January 2010 8:47 UTC www.gravytrain.co.uk [Source type: General]

 ^ The server returns this response when the requested resource has been permanently removed.
  • Expired items should return 404 HTTP error code - PhotoPost Community 11 January 2010 20:19 UTC www.photopost.com [Source type: General]

 .Because these two options require special server configuration, most websites do not make use of them.^ RFC2616 before using most of these.
  • HTTP Status Codes and .htaccess ErrorDocuments 11 January 2010 20:19 UTC www.askapache.com [Source type: FILTERED WITH BAYES]

 ^ If the server does not wish to make this information available to the client, the status code 404 (Not Found) can be used instead .
  • Tomek's DS World : HTTP 404 … case of missing ASPX page 11 January 2010 20:19 UTC blogs.dirteam.com [Source type: General]

 ^ Having one of these two options will allow you to better keep tabs on your 404 errors.
.404 errors should not be confused with DNS errors, which appear when the given URL refers to a server name that does not exist.^ Commerce Server Manager - Error 404 .
  • Commerce Server Manager - Error 404 - Commerce Server - Software Development 10 February 2010 10:35 UTC www.projectthunder.com [Source type: FILTERED WITH BAYES]

 ^ It should show me a custommade 404-error.
  • CMS Made Simple Forum: Blank 404 error page after upgrade 10 February 2010 10:35 UTC forum.cmsmadesimple.org [Source type: FILTERED WITH BAYES]

 ^ How does WPMU blog URL? Getting 404 error .
  • WordPress MU › WordPress MU Forums » Tags — 404 10 February 2010 10:35 UTC mu.wordpress.org [Source type: General]

 .A 404 error indicates that the server itself was found, but that the server cannot retrieve the requested page.^ TOPIC: error 404 message page not found .
  • Re:error 404 message page not found - RSJoomla! Forum 10 February 2010 10:35 UTC www.rsjoomla.com [Source type: General]

 ^ Don't do 404 error pages !
  • A List Apart: Comments: The Perfect 404 11 January 2010 20:19 UTC www.alistapart.com [Source type: General]

 ^ On submit 404 page not found error on Mac machines   .
  • myContactForm.com - Help Forum :: View topic - On submit 404 page not found error on Mac machines 10 February 2010 10:35 UTC www.mycontactform.com [Source type: General]

Custom error pages

A screenshot of a 404 error page on Wikipedia.
.Webservers can typically be configured to display a customised error page, including more natural description, the parent site's branding or sometimes a search form, but the protocol level phrase, which is hidden from the user, is rarely customized.^ Custom 404 error page - redirecting pages .
  • Custom 404 error page - redirecting pages - Administration and Configuration - DotNetNuke 19 January 2010 8:47 UTC www.dotnetnuke.com [Source type: General]

 ^ What is a Custom 404 error page?
  • [ ADDR.com: Help Center ] 19 January 2010 8:47 UTC www.addr.com [Source type: General]

 ^ Custom 404 Error Page .
  • Custom 404 Error Page - AspDotNetStorefront Community | ASP.NET eCommerce Shoppingcart Software 10 February 2010 10:35 UTC forums.aspdotnetstorefront.com [Source type: FILTERED WITH BAYES]
  • Custom 404 Error Page 10 February 2010 10:35 UTC www.johnnyflash.net [Source type: General]
  • Website Source » Blog Archive » Custom 404 Error Page 10 February 2010 10:35 UTC websitesource.com [Source type: General]
  • Custom 404 Error Page | drupal.org 19 January 2010 8:47 UTC drupal.org [Source type: General]
.Internet Explorer (before Internet Explorer 7), however, will not display custom pages unless they are larger than 512 bytes, opting to instead display a "friendly" error page.^ Make the file size larger than 512 bytes .
  • Finding Lost Souls – Customized 404 Error Pages Is Good Marketing | SEMClubHouse - Key Relevance Blog 10 February 2010 10:35 UTC www.semclubhouse.com [Source type: General]
  • Finding Lost Souls – Customized 404 Error Pages Is Good Marketing | SEMClubHouse - Key Relevance Blog 19 January 2010 8:47 UTC www.semclubhouse.com [Source type: General]

 ^ Custom 404 error page - redirecting pages .
  • Custom 404 error page - redirecting pages - Administration and Configuration - DotNetNuke 19 January 2010 8:47 UTC www.dotnetnuke.com [Source type: General]

 ^ Custom 404 Error Page .
  • Custom 404 Error Page - AspDotNetStorefront Community | ASP.NET eCommerce Shoppingcart Software 10 February 2010 10:35 UTC forums.aspdotnetstorefront.com [Source type: FILTERED WITH BAYES]
  • Custom 404 Error Page 10 February 2010 10:35 UTC www.johnnyflash.net [Source type: General]
  • Website Source » Blog Archive » Custom 404 Error Page 10 February 2010 10:35 UTC websitesource.com [Source type: General]
  • Custom 404 Error Page Download - Softpedia 10 February 2010 10:35 UTC webscripts.softpedia.com [Source type: FILTERED WITH BAYES]
  • Custom 404 Error Page | drupal.org 19 January 2010 8:47 UTC drupal.org [Source type: General]

 .Google Chrome includes similar functionality, where the 404 is replaced with alternative suggestions generated by Google algorithms, if the page is under 512 bytes in size.^ I get the generic "HTTP 404 Not Found" page.

 ^ IIS Generic 404 Error Page .

 ^ What to include on a custom 404 page .
  • Website Source » Blog Archive » Custom 404 Error Page 10 February 2010 10:35 UTC websitesource.com [Source type: General]

False 404 errors

.Some websites report a "not found" error by returning a standard web page with a "200 OK" response code; this is called a soft 404.^ I have also noticed that my shortcuts are returning a 404 - Not Found error as well.
  • OpenDNS Community > Forums > Shortcuts and blocked URLs return 404 error 19 January 2010 8:47 UTC forums.opendns.com [Source type: General]

 ^ On submit 404 page not found error on Mac machines   .
  • myContactForm.com - Help Forum :: View topic - On submit 404 page not found error on Mac machines 10 February 2010 10:35 UTC www.mycontactform.com [Source type: General]

 ^ Error - HTTP 404 - Status report .
  • Error - HTTP 404 - Status report (Servlets forum at JavaRanch) 11 January 2010 20:19 UTC www.coderanch.com [Source type: General]

 .Soft 404s are problematic for automated methods of discovering whether a link is broken.^ Very useful if a link from another website is causing 404s, with this feature you can automatically redirect users to another address.
  • 404 Manager - Free HTTP 404 Redirect/Redirection Perl Script 11 January 2010 20:19 UTC www.theemiratesnetwork.com [Source type: General]

 ^ You may also want to install Alex King’s 404 Notifier which reports broken links in your blog to see whether everything is going [...
  • 404 Notifier 1.0 | alexking.org 11 January 2010 20:19 UTC alexking.org [Source type: General]

 ^ April 6, 2005 by AndrewF My site emails me with ‘broken links’—-404s where the referrer is my site.

 .Soft 404s can occur as a result of configuration errors when using certain http server software, for example with the Apache software, when an Error Document 404 (specified in a .htaccess file) is specified as an absolute path (e.g.^ More on this 404's are used for when a file is not found.
  • Expired items should return 404 HTTP error code - PhotoPost Community 11 January 2010 20:19 UTC www.photopost.com [Source type: General]

 ^ Re: custom 404 error document .
  • custom 404 error document - Webmaster Forums 10 February 2010 10:35 UTC www.ahfb2000.com [Source type: FILTERED WITH BAYES]

 ^ Re: ERROR: HTTP 404 .
  • ERROR: HTTP 404 - Administration and Configuration - DotNetNuke 10 February 2010 10:35 UTC www.dotnetnuke.com [Source type: General]

 http://example.com/error.html) rather than a relative path (/error.html).[2]
.Some proxy servers generate a 404 error when the remote host is not present, rather than returning the correct 500-range code when errors such as hostname resolution failures or refused TCP connections prevent the proxy server from satisfying the request.^ Commerce Server Manager - Error 404 .
  • Commerce Server Manager - Error 404 - Commerce Server - Software Development 10 February 2010 10:35 UTC www.projectthunder.com [Source type: FILTERED WITH BAYES]

 ^ Error 404: The object you requested could not be found on this server.
  • Error 404: Doubting the Web 10 February 2010 10:35 UTC iat.ubalt.edu [Source type: FILTERED WITH BAYES]

 ^ Substantial Failure 404.1670 General.

 .This can confuse programs that expect and act on specific responses, as they can no longer easily distinguish between an absent web server and a missing web page on a web server that is present.^ They happen if visitors have bookmarked pages that no longer exist.
  • Turn Harmful 404 Error Pages Into Helpful 301 Redirects 19 January 2010 8:47 UTC www.selfseo.com [Source type: General]

 ^ Web server pages and metaphone codes .
  • Make your 404 pages smarter with metaphone matching 10 February 2010 10:35 UTC www.ibm.com [Source type: General]

 ^ Sometimes randomly on some server it stops serving pages and users get page not found response back (http status code 404).
.In July 2004, the UK telecom provider BT Group deployed the Cleanfeed content blocking system, which returns a 404 error to any request for content identified as potentially illegal by the Internet Watch Foundation.^ Administrative : Shortcuts and blocked URLs return 404 error .
  • OpenDNS Community > Forums > Shortcuts and blocked URLs return 404 error 19 January 2010 8:47 UTC forums.opendns.com [Source type: General]

 ^ RSS Watches return a 404 error from RAM    .
  • developerWorks : Rational : Rational Asset Manager : RSS Watches return a 404 error from RAM ... 19 January 2010 8:47 UTC www.ibm.com [Source type: FILTERED WITH BAYES]

 ^ The requested URL returned error: 503 .
  • Dems Say New RNC Website Suggests 'True' Future For GOP | TPMDC 19 January 2010 8:47 UTC tpmdc.talkingpointsmemo.com [Source type: FILTERED WITH BAYES]

 .Other ISPs return a HTTP 403 "forbidden" error in the same circumstances.^ HTTP/1.1 403 Forbidden 403 Forbidden Forbidden .
  • HTTP Status Codes and .htaccess ErrorDocuments 11 January 2010 20:19 UTC www.askapache.com [Source type: FILTERED WITH BAYES]

 ^ Code: ErrorDocument 404 /notfound.html There are a couple others you might set as well if you have over wrote those as well, such as the 403 forbidden, or the 500 Internal Server Error.
  • 404 apache error message - Hard Hat Hosting Community 10 February 2010 10:35 UTC www.hardhathosting.com [Source type: General]

 ^ In the case of an HTTP/1.0 request for a missing resource, either a 404-Not Found or 403-Forbidden response would be correct.
.Some search engines, like Yahoo, use automated processes to detect soft 404 errors.^ I personally like the Plankton 404 error :) .
  • 31 Cool 404 Error Page Designs - TutZone 11 January 2010 20:19 UTC www.tutzone.org [Source type: General]

 ^ Search gives a 404 Error .
  • Search gives a 404 Error - Movable Type Forums 10 February 2010 10:35 UTC forums.movabletype.org [Source type: FILTERED WITH BAYES]

 ^ This template will be used for all 404 errors.
  • Django | Writing Views | Django documentation 11 January 2010 20:19 UTC docs.djangoproject.com [Source type: FILTERED WITH BAYES]

 [3]

Slang usage

.In 2008, a study found that "404" had become a slang synonym for "clueless" in the UK.^ This web site is called Test Site 404; the name is derived from the Page Not Found (404) errors.  Currently, it is just for test purposes, but may become useful in the future.

 ^ Instead, 404 Not Found page has become popular and the most commonly used error page.

 ^ How to set a custom 404 (not found) error page « on: October 19, 2008, 04:00:30 AM » .
  • How to set a custom 404 (not found) error page 10 February 2010 10:35 UTC www.computerhope.com [Source type: General]

 .Slang lexicographer Jonathon Green said that "404" as a slang term had been driven by the "influence of technology" and young people, but at the current time, such usage was relatively confined to London and other urban areas.^ When you put links on your 404 Document Not Found page, such as hyperlinks leading to other pages on your site or links to images (such as your logo), be sure that you use the full URL and not a relative link.
  • How to Set Up a Custom 404 File Not Found Page on your Website (thesitewizard.com) 11 January 2010 20:19 UTC www.thesitewizard.com [Source type: General]

 ^ Here’s the 404 page sorabji.com/ahsdjal And here is the current list of What people were looking for when they had their bad landing.
  • Wanted: Your 404 Error Pages - Smashing Magazine 19 January 2010 8:47 UTC www.smashingmagazine.com [Source type: General]

 ^ Current 404 handlers allow you to provide a few suggested links for all errors, such as pointing the users to the site directory.
  • Make your 404 pages smarter with metaphone matching 10 February 2010 10:35 UTC www.ibm.com [Source type: General]

 .The study, carried out by the telecommunications arm of the Post Office, concluded that writing abbreviations such as "404" was expedient to the sender, while an Australian study found that such phrases impaired the intelligibility of the message.^ By the time I am done fixing things up I should be able to write a really helpful post for my readers, sure hope they will be able to find it without a 404 error.
  • Create a Custom 404 Error Page for Your Blog 10 February 2010 10:35 UTC www.problogger.net [Source type: General]

 ^ Sylvia Myers, provided instructions to enable the webmaster to provide a personalized 404 message that would then redirect the user to an appropriate index page such as the home page.
  • 404 Error Foretold in Old and New Testament Lexicons 10 February 2010 10:35 UTC www.greaterthings.com [Source type: General]

 ^ Generally, a web server issues an HTML page that has the 404 code and the “Not Found” phrase by default.

 [4]

404 page widgets

.While many websites send additional information in a 404 error message—such as a link to the homepage of a website or a search box—there are also much more advanced extensions available as widgets that endeavor to find the correct web page the user wanted.^ Log-out Error 404 page .
  • 404 Error after upload - PhotoPost Community 10 February 2010 10:35 UTC www.photopost.com [Source type: General]

 ^ Creating User Friendly 404 Pages .
  • Coding Horror: Creating User Friendly 404 Pages 11 January 2010 20:19 UTC www.codinghorror.com [Source type: General]

 ^ See the User Administration page for more information.

 [5]

Origin

An apocryphal story or urban legend claims that the message originated in the location of the error-tracing section at CERN -- in room 404.[1]

See also

References

  1. ^ "6.1.1 Status Code and Reason Phrase". http://www.w3.org/Protocols/rfc2616/rfc2616-sec6.html#sec6.1.1. Retrieved 22 June 2008. 
  2. ^ ""Farewell to soft 404s", Google Official Blog". http://googlewebmastercentral.blogspot.com/2008/08/farewell-to-soft-404s.html. Retrieved 20 September 2008. 
  3. ^ ""Why is your crawler asking for strange URLs that have never existed on my site?", Yahoo Web Crawler Help page". http://help.yahoo.com/l/uk/yahoo/search/webcrawler/slurp-10.html. Retrieved 4 October 2009. 
  4. ^ "Don't be 404, know the tech slang". BBC News. 2008-12-10. http://news.bbc.co.uk/1/hi/technology/7775013.stm. Retrieved 2008-12-13. 
  5. ^ Swenson, Sahala (August 19, 2008). "Make your 404 pages more useful". Official Google Webmaster Central Blog. Google, Inc. http://googlewebmastercentral.blogspot.com/2008/08/make-your-404-pages-more-useful.html. Retrieved August 28, 2009. 

External links


Citable sentences

Up to date as of November 30, 2010

Here are sentences from other pages on HTTP 404, which are similar to those in the above article.








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