How to setup htaccess 301 redirect?

Question

htaccess

It is required to set up a 301 redirect from all pages

site/catalog/osnova/page/2/
site/catalog/osnova/page/3/
site/catalog/osnova/page/4/

to

site/catalog/osnova/

By how much I don't know how much pages will be in each section, how to make all pages go to the main

Answer 1

RewriteCond %{REQUEST_URI} ^/catalog/osnova/(.+)$ 
   # если строка начинается с /dir1/ 
RewriteRule ^(.*)$ /catalog/osnova? [R=301,L] 
   #Перенаправить все URL с начинающиеся с dir1 на dir2 с сохранением дальнейшей структуры URL