今天在 Fedora 20 上更新应用，碰到一大堆 warnings： Warning: group core does not exist. Warning: group gnome-desktop does not exist. Warning: group multimedia does not exist. Warning: group firefox does not exist. Warning: group guest-desktop-agents does not exist. Warning: group base-x does not exist. Warning: group anaconda-tools does not exist. Warning: group fonts does not exist. Warning: group… Continue reading Yum clean all cleaned warnings