cockpit from home:lkocman:branches:openSUSE:Leap:15.6 project

Выберите операционную систему

Для standard запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/home:lkocman:branches:openSUSE:Leap:15.6/standard/home:lkocman:branches:openSUSE:Leap:15.6.repo
zypper refresh
zypper install cockpit