redirect all url from a root domain to a subdomain, except homepage

Question

I had the following wordpress multisite:

mysite.com
city2.mysite.com
city3.mysite.com

that became these:

mysite.com
city1.mysite.com
city2.mysite.com
city3.mysite.com

mysite.com should become a single landing page and i want all the urls starting like mysite.com/myurl redirecting to city1.mysite.com/myurl .

Note that all the websites use the same .htaccess .

I tried to implement a lot of examples found on Stackoverflow, but none of them covered this case and my attempts to adapt the code didn't work.

Thank you,

Bru

Answer 1

This is a helpful plugin: https://wordpress.org/plugins/simple-301-redirects/

I have not used in multisite, but I feel it should be fine.