需要 openSUSE Tumbleweed ，用 root 執行：
zypper addrepo https://download.opensuse.org/repositories/Documentation/openSUSE_Tumbleweed/Documentation.repo
zypper refresh
zypper install mandoc
需要 openSUSE Factory ARM ，用 root 執行：
zypper addrepo https://download.opensuse.org/repositories/Documentation/openSUSE_Factory_ARM/Documentation.repo
zypper refresh
zypper install mandoc
需要 openSUSE Factory ，用 root 執行：
zypper addrepo https://download.opensuse.org/repositories/Documentation/openSUSE_Factory/Documentation.repo
zypper refresh
zypper install mandoc
需要 15.6 ，用 root 執行：
zypper addrepo https://download.opensuse.org/repositories/Documentation/15.6/Documentation.repo
zypper refresh
zypper install mandoc
需要 15.5 ，用 root 執行：
zypper addrepo https://download.opensuse.org/repositories/Documentation/15.5/Documentation.repo
zypper refresh
zypper install mandoc