需要 openSUSE Tumbleweed ，用 root 執行：
zypper addrepo https://download.opensuse.org/repositories/home:nad1r/openSUSE_Tumbleweed/home:nad1r.repo
zypper refresh
zypper install systemd-zram-service
需要 15.6 ，用 root 執行：
zypper addrepo https://download.opensuse.org/repositories/home:nad1r/15.6/home:nad1r.repo
zypper refresh
zypper install systemd-zram-service
需要 15.5 ，用 root 執行：
zypper addrepo https://download.opensuse.org/repositories/home:nad1r/15.5/home:nad1r.repo
zypper refresh
zypper install systemd-zram-service