How to: 301 redirect /post/%post_id% to /?tegory%/%postname%

This might help
https://www.ads-software.com/plugins/redirection/

I’ve tried this. This doesn’t recognize permalink tags, like %post_id%, %category%, %postname% etc.

How about using htaccess?

https://www.ads-software.com/support/topic/301-redirect-for-single-posts-in-htaccess-stumped?replies=3

editing .htaccess wasn’t working for me. However, this worked perfectly:

Add this code to function.php

function custom_rewrite_function() {
  add_rewrite_rule('^post/([0-9]+)/?', 'index.php?page_id=$matches[1]', 'top');
}
add_action('init', 'custom_rewrite_function');

Go to, Settings > Permalink. Hit Save Changes without modifying any options.

This redirects all the /post/%post_id% links to my current permalink ( /%category%/%postname% ).

Yahoo!

would this work for redirecting

/%postname%/

to

/%category%/%postname%/

?

thx!