阿里镜像源，直接在终端安装，首先在终端输入 su 点击回车，输入密码，密码输入时为了安全是不显示的，你输入以后直接回车就可以了。
zypper addrepo -f http://mirrors.aliyun.com/opensuse/update/leap/42.3/oss openSUSE-42.3-Update-Oss
zypper addrepo -f http://mirrors.aliyun.com/opensuse/update/leap/42.3/non-oss/ openSUSE-42.3-Update-Non-Oss
zypper addrepo -f http://mirrors.aliyun.com/opensuse/distribution/leap/42.3/repo/oss/ openSUSE-42.3-Oss
zypper addrepo -f http://mirrors.aliyun.com/opensuse/distribution/leap/42.3/repo/non-oss/ openSUSE-42.3-Non-Oss
zypper addrepo -f http://mirrors.aliyun.com/packman/openSUSE_Leap_42.3/ aliyun-packman
科大镜像源：
zypper ar -fc https://mirrors.ustc.edu.cn/opensuse/distribution/leap/42.3/repo/oss USTC:42.3:OSS
zypper ar -fc https://mirrors.ustc.edu.cn/opensuse/distribution/leap/42.3/repo/non-oss USTC:42.3:NON-OSS
zypper ar -fc https://mirrors.ustc.edu.cn/opensuse/update/leap/42.3/oss USTC:42.3:UPDATE-OSS
zypper ar -fc https://mirrors.ustc.edu.cn/opensuse/update/leap/42.3/non-oss USTC:42.3:UPDATE-NON-OSS
手动刷新软件源：
sudo zypper ref
禁用原有软件源：(可以先禁用所有的软件源，再添加新的软件源)
sudo zypper mr -da