you can have custom 404 pages, you need to make a file in your public_html called 404.shtml Please note that it is Shtml not just html. This is the page that the site directs the user to when they get a 404 error.
This works for 501, 401, 402 also...
how come
That's not the only purpose that htaccess has, you realize.then whats the purpose of allowing to use .htaccess its ,,,,,,,,,//