To be able to redirect all links from the old domain to new one you need to edit .htaccess file on the old domain like this:
RewriteEngine on RewriteCond %{HTTP_HOST} ^old-domain.info [NC,OR] RewriteCond %{HTTP_HOST} ^www.old-domain.info[NC] RewriteRule ^(.*)$ http://www.new-domain.com/\ [L,R=301,NC]
Of course you need to change old-domain.info to the yours old domain name and new-domain.com with yours new domain name.