For sure you've already seen that ".htaccess" file in your web hosting account and maybe you've been asking yourself what is it used for. In this article it is explained the basics to learn how to use the .htaccess.
You can customize your error pages right from your hosting account using cPanel! Login to cPanel as described in your welcome email. Look for the "Advanced Tools" box and click on "Custom Error Pages" icon. The most common error pages are displayed for you to edit. In most cases you won't need more than that,