change url

Hi everyone, I want to change my forum homepage link from ex: techpedia.com to techpedia.com/forums (by permanent redirection means opening techpedia.com will open techpedia.com/forums) , but i want to keep all other new & old links ( links for existing threads stuffs of resource manager)...

Hi Guy, My forum: https://mecuabe.com/forum/ i want to move folder forum to root public_html but not change url mecuabe.com/forum/ and Home page: mecuabe.com/forum/articles/ What can I do?