hi all, I'm trying to understand Fedora so go easy on me, I'm trying to change my mind around from a windows perpective and it's not easy

, my question relates to yum, having read what it does I now understand it's used to update packages however it's just not working for me , this problem comes from me trying to get snort installed and working on my machine, yum is the first thing you are asked to use and it fails, then a friend of mine suggested editing the .repo file but I think there's something wrong with how yum is pulling any of these repo files, this is the message I get when trying to install the mcedit application (in order to addres the snort issue) The Internet is working fine ....so below is the message I get for any attempt to use yum install (and yes I'm logged in as root) what what I used to call administrator
yum install mc
Loaded plugins: langpacks, presto, refresh-packagekit
Adding en_US to language list
Error: Cannot retrieve repository metadata (repomd.xml) for repository: fedora. Please verify its path and try again