For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:jlkDE/openSUSE_Tumbleweed/home:jlkDE.repo
zypper refresh
zypper install duf
For openSUSE Slowroll run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:jlkDE/openSUSE_Slowroll/home:jlkDE.repo
zypper refresh
zypper install duf
For openSUSE Factory ARM run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:jlkDE/openSUSE_Factory_ARM/home:jlkDE.repo
zypper refresh
zypper install duf
For 16.0 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:jlkDE/16.0/home:jlkDE.repo
zypper refresh
zypper install duf
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:jlkDE/15.6/home:jlkDE.repo
zypper refresh
zypper install duf