Redirect to same domain

[Paxi]

Hello everybody,

I am in the process of migrating one domain (new website ='A') to another (old website ='B').

The old website ('B') has been there since the 90's and needed a major update. For this reason a new website was set up in WordPress ('A') which has (for now) a random domain name, but will have the same domain name as the old website after the migration. The individual pages will have different URL though.

Since I don't want to lose the google ranking of the individual pages, I was wondering how I can redirect the old URLs to the new ones? 301 redirect?

I would appreciate any advice.

Thank you in advance!
Paxi

[wellliving]

<IfModule mod_rewrite.c>
  RewriteEngine On
  RewriteCond %{HTTP_HOST} ^abc.com$ [OR]
  RewriteCond %{HTTP_HOST} ^http://www.abc.com$
  RewriteRule (.*)$ http://www.abc.com/blog$1 [P]
</IfModule>