Help on Yum repos

[Wong Kwok-hon]

Hello!

I upgrade to FC5 from FC4 via yum and found the yum.repos as follow:-

-rw-r--r--  1 root root   325 Feb  1  2005 fedora
-rw-r--r--  1 root root   916 Mar 23 21:33 fedora-core.repo
-rw-r--r--  1 root root  1549 Mar 15 07:20 fedora-development.repo
-rw-r--r--  1 root root   780 Mar 15 07:20 fedora-extras-development.repo
-rw-r--r--  1 root root   763 Mar 15 07:20 fedora-extras.repo
-rw-r--r--  1 root root   486 Mar 15 07:20 fedora-legacy.repo
-rw-r--r--  1 root root   366 Feb  1  2005 fedora-updates
-rw-r--r--  1 root root   865 Mar 15 07:20 fedora-updates-testing.repo
-rw-r--r--  1 root root   790 Mar 15 07:20 fedora-updates.repo

Would someone tell me which is/are  working in Fedora Core 5 in
original yum and I can delete the un-useful repos ?
Because I forgot some setting of them....

Thanks!

Wong Kwok Hon