# yum grouplist | grep Virt # yum grouplist | grep Virt | wc -l 0
However you can still see a group with groupinfo:
# yum groupinfo Virtualization Loaded plugins: langpacks, list-data, presto, refresh-packagekit Group: Virtualization Group-Id: virtualization Description: These packages provide a virtualization environment.
Apparently there can be a "hidden" tag on groups, as reported in this Bugzilla entry:
Bug 986531 - unhide all groups from yum grouplist
You can see all the groups with the yum grouplist hidden command:
# yum grouplist | wc -l 39 # yum grouplist hidden | wc -l 126