On 2018-04-12, Paul R. Ganci <ganci at nurdog.com> wrote: > I just did a fresh minimal install of centos 7 on new hardware. While > playing around with window systems I removed X windows like so: > > >yum remove "X Window system" > > and then tried to re install > > >yum group install "X Window system" > > which gives this error: > > Maybe run: yum groups mark install (see man yum) No packages in any > requested group available to install or upgrade > > I tried running: > > >yum groups mark install "X Window system" > > and get the same message. I tried different permutations removing the > "s" on groups. Nothing seems to bring back the yum "X Window system" > group. Can anyone help me resolve this issue and tell me what I did > wrong? > > Thanks for your help. > Try yum group install "X Window System" Note the capital 'S'.