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Custom 404 Page

You can easily serve custom 404 error pages with Jekyll to replace the default Error 404 – File Not Found page displayed when one tries to access a broken link on your site.

On GitHub Pages

Any 404.html at the root of your _site directory will be served automatically by GitHub Pages and the local WEBrick development server.

Simply add a 404.md or 404.html at the root of your site’s source directory and include front matter data to use the theme’s base layout.

If you plan to organize your files under subdirectories, the error page should have the following Front Matter Data, set: permalink: /404.html. This is to ensure that the compiled 404.html resides at the root of your processed site, where it’ll be picked by the server.

---
# example 404.md

layout: default
permalink: /404.html
---

# 404

Page not found! :(

Hosting on Apache Web Servers

Apache Web Servers load a configuration file named .htaccess that modifies the functionality of these servers.

Simply add the following to your .htaccess file.

ErrorDocument 404 /404.html

With an .htaccess file, you have the freedom to place your error page within a subdirectory.

ErrorDocument 404 /error_pages/404.html

Where the path is relative to your site’s domain.

More info on configuring Apache Error Pages can found in official documentation.

Hosting on Nginx server

The procedure is just as simple as configuring Apache servers, but slightly different.

The nginx configuration file depends on the system in which it is installed. In most systems, it is the nginx.conf file, which is usually located inside /etc/nginx/ or /etc/nginx/conf/. However, in other systems like Ubuntu, you would have to look for a default nginx configuration file, containing server related information, which is usually located inside /etc/nginx/sites-available/ or /etc/nginx/sites-enabled/. Add the following to your nginx configuration file, i.e. either to nginx.conf file or to default file:

server {
  error_page 404 /404.html;
  location = /404.html {
    internal;
  }
}

If the server block already exists, only add the code inside the server block given above. The location directive prevents users from directly browsing the 404.html page.

More info on nginx error page can be found on nginx official documentation.

Proceed with caution while editing the configuration file.

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