Для openSUSE Tumbleweed запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/home:markusd:samba:samba-4.21-related:samba-4.21-heimdal-dc/openSUSE_Tumbleweed/home:markusd:samba:samba-4.21-related:samba-4.21-heimdal-dc.repo
zypper refresh
zypper install cifs-utils
Для 15.6 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/home:markusd:samba:samba-4.21-related:samba-4.21-heimdal-dc/15.6/home:markusd:samba:samba-4.21-related:samba-4.21-heimdal-dc.repo
zypper refresh
zypper install cifs-utils