correct 301 coding

Can some confirm the correct way to 301 redirect stuff:


Scenario1
----------
redirect domain.com to www.domain.com

Is it:

RewriteEngine On
RewriteBase /
RewriteCond %{HTTP_HOST} ^domain\.co.uk
RewriteRule ^(.*)$ http://www.domain.co.uk/$1 [R=permanent,L]

Code (markup):

Scenario2
-----------
redirect www.domain.com to www.domain.co.uk

Is it:

RewriteEngine On
RewriteBase /
RewriteCond %{HTTP_HOST} ^domain\.com
RewriteRule ^(.*)$ http://www.domain.co.uk/$1 [R=permanent,L]

Code (markup):

does the R=permanent need to be R=301?

For my error documents I have simple code as :

ErrorDocument 401 http://www.domain.co.uk/401.shtml

Will google recognise the 301 code ?

thanks

 

Here is what is working for me:

    RewriteEngine on
    RewriteCond %{HTTP_HOST}                !^www.internet-search-engines-faq.com(:80)?$
    RewriteRule ^/(.*)                      http://www.internet-search-engines-faq.com/$1 [L,R=301]

Code (markup):