yum groupinstall kvm -y
Loaded plugins: fastestmirror, presto
Loading mirror speeds from cached hostfile
* base: ftp.tlk-l.net
* epel: ftp.tlk-l.net
* extras: ftp.tlk-l.net
* rpmforge: ftp-stud.fht-esslingen.de
* updates: ftp.tlk-l.net
Setting up Group Process
Checking for new repos for mirrors
epel/group_gz | 201 kB 00:00
Warning: Group kvm does not exist.
No packages in any requested group available to install or update

[root@localhost etc]# yum install kvm
Loaded plugins: fastestmirror, presto
Loading mirror speeds from cached hostfile
* base: ftp.tlk-l.net
* epel: ftp.tlk-l.net
* extras: ftp.tlk-l.net
* rpmforge: ftp-stud.fht-esslingen.de
* updates: ftp.tlk-l.net
Setting up Install Process
No package kvm available.
Error: Nothing to do