how rewrite to http://ift.tt/2ezb5qU when url just type "domian.com/test_site"

normal condition
redirect to "http://www.domain.com" when just type "domain.com"

we can use like below on .htaccess file

RewriteEngine on
RewriteCond %{HTTP_HOST} ^(www\.)?domain\.com$
RewriteRule ^$ http://ift.tt/wAZaPt [L,R=301]

================================================================= if anyone know when use append folder to be a website ? how to set rule on .htaccess?

if i want to just type "domain.com/uat_01" hope redirect to "http://ift.tt/2ezdhi7" or "http://ift.tt/2eJsTND"