ServerAdmin ???@iambloger.com
DocumentRoot /home/???/public_html
ServerName www.iambloger.com
ServerAlias iambloger.com
RewriteEngine on
RewriteCond %{HTTP_HOST} !^www.iambloger.com$
RewriteCond %{HTTP_HOST} ^iambloger.com$
RewriteRule ^/(.*) http://www.iambloger.com/$1 [R,L]
DocumentRoot /home/???/public_html
ServerName www.iambloger.com
ServerAlias iambloger.com
RewriteEngine on
RewriteCond %{HTTP_HOST} !^www.iambloger.com$
RewriteCond %{HTTP_HOST} ^iambloger.com$
RewriteRule ^/(.*) http://www.iambloger.com/$1 [R,L]
예제입니다. 도메인 부분을 잘 참고하여 수정하시면 됩니다.