Glossery - C

Catch-All Email


In the context of e-mail, a catch-all usually refers to a mailbox on a domain that will "catch all" of the emails addressed to the domain that do not exist in the mail server. Configuring a catch-all address can help avoid losing emails due to misspelling.




Common Gateway Interface (CGI) is a standard environment for web servers to interface with executable programs installed on a server that generate web pages dynamically


Contact Form

If you want your site visitors to be able to send you messages from your site, you can add a contact form.



If you want to let your site visitors leave comments on webpages, you need to insert the Commenting module into those webpages.

The commenting functionality is powered by Disqus, a third-party service that stores and processes all comments. Before your visitors can leave comments, you need to register an account with Disqus and then specify a site ID in the Commenting module settings.

You can insert several Commenting modules into a single website. Because all Commenting modules on the site will use the same site ID, you will only need to specify the site ID once in the module settings, when inserting the first Commenting module.



An internet cookie is information that is stored by a Web browser (generally on your hard drive) from a Web server. The information is then sent back to the Web server each time you request a webpage on that Web server.


Cron (Cron Jobs)


Cron is the ability to run programs based on the server clock. A cron job is a scheduled task that you want to automatically run at a scheduled time, e.g. run my backup at 7:30pm everyday. You need to create a cron table or "crontab", a file of dates and commands that you want to run. A crontab file instructs the server to run specific commands at a given time.

CSS (Cascading Style Sheets)


or Cascading Style Sheets are rules for displaying specific elements of an HTML Web page. One advantage of CSS is the ability to control all design elements of a single page or an entire website from a single file. Hosting a website is much more manageable when utilizing CSS. For more information on CSS see


Custom Error Pages


Instead of seeing the default error messages, you can create your own error pages.

In order to setup custom error pages in Plesk on a Windows server, please do the following:
Turning on Custom Error Pages

Before you can use custom error pages, you must first turn them on.

  1.     Login to Plesk
  2. Click on the Websites & Domains tab.
  3. On the list of domain name at the bottom, click on the domain name you are configuring.
  4. Check the box for Customer error documents.
  5. Click OK.

    You will be taken back to the Websites & Domains tab and it should say "Information: The settings were successfully updated" near the top of the page.

Once you have Custom Error Pages turned on, you have two options for setting them up:  edit the existing error documents, or create new ones.
Option 1: Editing an Existing Custom Error Page

The easiest way to create your own error page is to edit the ones already there.

  1.     Click on the Website & Domains tab (if not already on that page).
  2. Click on File Manager.
  3. Click on the error_docs folder (the text link or the folder in front of the link).
  4. Click on the error page you want to edit.  For example, Not_Found.html.
  5. Use Plesk's built-in HTML editor to edit the error page.
  6. Click OK to save your changes.

Once saved, your changes will take effect.  No additional steps necessary.

Option 2: Setting up Custom Error Pages

Instead of editing the existing error pages, you can create your own with different filenames, or even specify that it redirects to a specific URL instead.

Step 1: Creating the New Error Page

Create a new page and upload it to your domain.  It can be named anything, and can be in any supported language such as HTML, PHP, ASP and ASP.NET.

You can use the File Manager in Plesk to create a new file, and then edit it, or create it on your own computer and then FTP it to the server.

Step 2: Telling the Server to Use the New Error Page

    Click on the Website & Domains tab (if not already on that page).
    Click on Show Advanced Options (grey link near the middle of the page) if the advanced options are not already shown.
    Click on Virtual Directories.
    Click on the Error Documents tab.
    Click on the Error Document you wish to change.
    Set the options for that error:
            Default - Use the Windows IIS Default Error Page.
            File - Use a specific file.  The file must be located in the error_docs directory.
            URL - Use a specific a custom error document located in a directory other than error_docs.
        Location:  Input the file name or URL, depending which type you selected.  If the custom error document is located in a directory other than error_docs, the path should be relative to the virtual host root (i.e.<vhosts>\<domain>\httpdocs).
        For example, /my_errors/forbidden_403_1.html
        Click OK.

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