Для openSUSE Tumbleweed запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/home:manfred-h:X11:xfce:4.21/openSUSE_Tumbleweed/home:manfred-h:X11:xfce:4.21.repo
zypper refresh
zypper install mousepad
Для openSUSE Slowroll запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/home:manfred-h:X11:xfce:4.21/openSUSE_Slowroll/home:manfred-h:X11:xfce:4.21.repo
zypper refresh
zypper install mousepad
Для 16.0 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/home:manfred-h:X11:xfce:4.21/16.0/home:manfred-h:X11:xfce:4.21.repo
zypper refresh
zypper install mousepad
Для 15.6 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/home:manfred-h:X11:xfce:4.21/15.6/home:manfred-h:X11:xfce:4.21.repo
zypper refresh
zypper install mousepad