best way to move a subdoamin to its own domain name

I have 40k+ indexed google pages for one of my subdomains called name; like
http://name.mysite.com

now i want to move this subdomain to its own domain name like
http://www.name.com

but at the same-time i want to keep all the already indexed links valid; that is all pages like

http://name.mysite.com/nme.php?var=....

should automatically redirected to

http://www.name.com/nme.php?var=....

how can I achieve something like that ?

 

I have already registered a main domain as www.name.com but I am not sure how can I rewrite the rules, where and how ?

 

For what u want edit this below code and add it to your .htaccess

#Options +FollowSymLinks
RewriteEngine on
RewriteCond %{HTTP_HOST} ^www.olddomain.com$[OR]
RewriteCond %{HTTP_HOST} ^olddomain.com$
RewriteRule ^(.*)$ http://www.newdomain.com/$1 [R=301,L] 

Code (markup):

 

Thank you Bohra, I will put this code into my .htaccess soon

 

Dont forget to edit it with your details

 

yes, of course; so according to what I have in the first message the code will be something like this:

#Options +FollowSymLinks
RewriteEngine on
RewriteCond %{HTTP_HOST} ^www.name.mysite.com$[OR]
RewriteCond %{HTTP_HOST} ^name.mysite.com$
RewriteRule ^(.*)$ http://www.name.com/$1 [R=301,L]

Code (markup):

please let me know if I am missing anything

 

you wont need this line

RewriteCond %{HTTP_HOST} ^www.name.mysite.com$[OR]


as ur on a sub domain

 

Oh, I see.

so here it is...

#Options +FollowSymLinks
RewriteEngine on
RewriteCond %{HTTP_HOST} ^name.mysite.com$
RewriteRule ^(.*)$ http://www.name.com/$1 [R=301,L]

Code (markup):

thank you again

 

Yes thats it... will work properly