Login your cpanel

1. Click the Redirects button on the front page under the “domains”
2. Enter the address of the web page to move in the first field.
3. Enter the redirection address in the second field. (this can be a sub domain
   and may be listed as a directory on home page).
4. Choose one of the following options in the list:
   *Temporary or *permanent
5. Click the Add button.

method 2 : Using .htaccess

Redirect 301 / http://www.new-domain.com

This redirect an entire site to a new domain: