Для openSUSE Tumbleweed запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/security:idm/openSUSE_Tumbleweed/security:idm.repo
zypper refresh
zypper install authselect
Для 15.6 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/security:idm/15.6/security:idm.repo
zypper refresh
zypper install authselect
Для 15.5 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/security:idm/15.5/security:idm.repo
zypper refresh
zypper install authselect