.htaccess redirect all pages except the home page

Question

I have just merged two websites. Site A is now merged with site B.

Site A has got a .htaccess file which redirects all of the content to the new domain where site B

Answer 1

Just change .* to .+ to make sure your regex pattern isn't matcinng landing page:

RewriteRule (.+) http://www.siteb.com/$1 [R=301,L,NE]