The
most common website errors such as 404 Page Missing,
401 Access Denied, etc can be customized to your
liking. To customize them, log in to CPanel. Then
click on the Custom Error Pages button listed under "Site
Management Tools". From there, select the code
number of the error you wish to customize. The next
page is the editing page, In the text box, you can
edit the HTML code for the error page.