Redirect from old pages to new WordPress when changing URL structure?

Question

htaccess

Previously, there were pages /%postname%/
Now I set /%category%/%postname%/
Now pages with urls /%postname%/ give 404.
How to put a redirect from articles /%postname%/ to /%category%/%postname %/?

Answer 1

Set up redirects at the Apache / Nginx level