Redirecting all links from one domain to new domain's homepage

[kheruc]

I need to redirect all links from olddomain.com to newdomain.com:

olddomain.com/article1.html -> www.newdomain.com
olddomain.com/article2.html -> www.newdomain.com

I tried:
Redirect 301 / http://www.newdomain.com/

but this redirects to www.newdomain.com/article1.html instead to www.newdomain.com/


I thought this would be simple, but I can't find solution