Para openSUSE Tumbleweed corra o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/home:duwe:arm/openSUSE_Tumbleweed/home:duwe:arm.repo
zypper refresh
zypper install unrar
Para 16.0 corra o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/home:duwe:arm/16.0/home:duwe:arm.repo
zypper refresh
zypper install unrar
Para 15.6 corra o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/home:duwe:arm/15.6/home:duwe:arm.repo
zypper refresh
zypper install unrar