How to configure htacces to redirect to the non-www version?

Question

htaccess

Good afternoon.
The problem is that for pages like www.site.ru/ggg.html the redirect goes to site.ru/ggg.html as it should be,
but from pages like www.site.ru/catalog/ggg.html the redirect does not work, that is, you type www.site.ru/catalog/ggg.html and it does not remove www.
How to solve this problem?
And also recommend what to read on htacces ..
The following is written in htacces

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

Answer 1

Try like this:

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