301 Redirect subfolder

[sgr2000]

How do I redirect a default subfolder page

Right now www.example.com/subfolder/ goes to 404 page not found

I need it to go to www.example.com/subfolder/example.html

How to I 301 redirect that?

[g1smd]

What have you tried? It is one line of

RewriteRule

code with

[R=301,L]

flags.

Alternatively, in the .htaccess file in that folder set the

DirectoryIndex

to use the example.html file.

[sgr2000]

the only thing I have tried is
Redirect 301 /units/csa-va/ [americanwars101.com...]
and that did not work and
Redirect 301 /units/csa-va/index.html [americanwars101.com...]
and that gave me a internal server error