对于 15.5，请以根用户 root 运行下面命令：
zypper addrepo https://download.opensuse.org/repositories/server:Kolab:16.1/15.5/server:Kolab:16.1.repo
zypper refresh
zypper install libqt4
对于 15.4，请以根用户 root 运行下面命令：
zypper addrepo https://download.opensuse.org/repositories/server:Kolab:16.1/15.4/server:Kolab:16.1.repo
zypper refresh
zypper install libqt4
对于 15.3，请以根用户 root 运行下面命令：
zypper addrepo https://download.opensuse.org/repositories/server:Kolab:16.1/15.3/server:Kolab:16.1.repo
zypper refresh
zypper install libqt4