Para openSUSE Tumbleweed corra o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/X11:xfce:4.21/openSUSE_Tumbleweed/X11:xfce:4.21.repo
zypper refresh
zypper install gtk2-metatheme-greybird
Para openSUSE Slowroll corra o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/X11:xfce:4.21/openSUSE_Slowroll/X11:xfce:4.21.repo
zypper refresh
zypper install gtk2-metatheme-greybird
Para openSUSE Factory corra o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/X11:xfce:4.21/openSUSE_Factory/X11:xfce:4.21.repo
zypper refresh
zypper install gtk2-metatheme-greybird
Para 16.0 corra o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/X11:xfce:4.21/16.0/X11:xfce:4.21.repo
zypper refresh
zypper install gtk2-metatheme-greybird
Para 15.6 corra o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/X11:xfce:4.21/15.6/X11:xfce:4.21.repo
zypper refresh
zypper install gtk2-metatheme-greybird