Code:
[root@localhost gareth]# yum install kernel-devel
Loaded plugins: refresh-packagekit
fedora | 2.4 kB 00:00
updates | 2.3 kB 00:00
Setting up Install Process
Parsing package install arguments
Package kernel-devel-2.6.25.14-108.fc9.i686 already installed and latest version
Nothing to do
[root@localhost gareth]# yum install kernel-headers
Loaded plugins: refresh-packagekit
Setting up Install Process
Parsing package install arguments
Package kernel-headers-2.6.25.14-108.fc9.i386 already installed and latest version
Nothing to do
[root@localhost gareth]#
It appears I already have both of these packages.