Help with Code for 301 redirct

I am not a coder, so I am hoping someone can check over what I am about to do (found a variety of code online and got some from Hostgator)

I want to redirect my www domain name to the non www
I also want to redirect the /index.htm page to non , though probably less important

This is the code I want to put in the .htaccess file:


RewriteCond %{HTTP_HOST} ^www.mydomain.com$

RewriteRule ^(.*)$ http://mydomain.com/$1 [R=301,L]

AND

RewriteCond %{THE_REQUEST} ^.*mydomain.com/index.htm\ HTTP/

RewriteRule ^(.*)mydomain.com/index.htm$ /$1 [R=301,L]


Do I need the following stuff? and if so do I need to change anything?

RewriteEngine On
RewriteCond %{HTTP_HOST} !^www\. [NC]
RewriteRule ^(.*) http://www.%{HTTP_HOST}/$1 [R=301,QSA,L]


Thanks!

 

Try:

RewriteCond %{HTTP_HOST} ^www.mydomain.com$
RewriteRule ^(.*)$ http://mydomain.com/$1 [R=301,L]

RewriteCond %{REQUEST_URI} ^/index.htm$
RewriteRule ^(.*)$ http://mydomain.com/ [R=301,L]

 

What about the Rewrite Engine On, etc?

Does anyone know how the 'redirect' in the General settings panel of Wordpress affects or interacts with the htacess file? I would be having them say the same thing, but since wordpress 'redircts' I cannot see a way to test the code I put in htacces file.

 

note, wordpress will always redirect to its homepage set in db

 

Does anyone know this?
Do I need the following stuff? and if so do I need to change anything?

RewriteEngine On
RewriteCond %{HTTP_HOST} !^www\. [NC]
RewriteRule ^(.*) http://www.%{HTTP_HOST}/$1 [R=301,QSA,L]