1、首先禁用默认软件源
hxstrive@hxstrive:~> sudo zypper mr -da
We trust you have received the usual lecture from the local System
Administrator. It usually boils down to these three things:
#1) Respect the privacy of others.
#2) Think before you type.
#3) With great power comes great responsibility.
[sudo] password for root:
Nothing to change for repository 'repo-backports-debug-update'.
Repository 'repo-backports-update' has been successfully disabled.
Nothing to change for repository 'repo-debug'.
Nothing to change for repository 'repo-debug-non-oss'.
Nothing to change for repository 'repo-debug-update'.
Nothing to change for repository 'repo-debug-update-non-oss'.
Repository 'repo-non-oss' has been successfully disabled.
Repository 'repo-oss' has been successfully disabled.
Nothing to change for repository 'repo-sle-debug-update'.
Repository 'repo-sle-update' has been successfully disabled.
Nothing to change for repository 'repo-source'.
Repository 'repo-update' has been successfully disabled.
Repository 'repo-update-non-oss' has been successfully disabled.2、切换为阿里云软件源，如下：
hxstrive@hxstrive:~> sudo zypper ar -fc https://mirrors.aliyun.com/opensuse/distribution/leap/15.2/repo/oss openSUSE-Aliyun-OSS
hxstrive@hxstrive:~> sudo zypper ar -fc https://mirrors.aliyun.com/opensuse/distribution/leap/15.2/repo/non-oss openSUSE-Aliyun-NON-OSS
hxstrive@hxstrive:~> sudo zypper ar -fc https://mirrors.aliyun.com/opensuse/update/leap/15.2/oss openSUSE-Aliyun-UPDATE-OSS
hxstrive@hxstrive:~> sudo zypper ar -fc https://mirrors.aliyun.com/opensuse/update/leap/15.2/non-oss openSUSE-Aliyun-UPDATE-NON-OSS3、更新软件源，如下：
hxstrive@hxstrive:~> sudo zypper ref
Retrieving repository 'openSUSE-Aliyun-NON-OSS' metadata ............[done]
Building repository 'openSUSE-Aliyun-NON-OSS' cache .................[done]
Retrieving repository 'openSUSE-Aliyun-OSS' metadata ---------------
Retrieving repository 'openSUSE-Aliyun-OSS' metadata ---------------
Retrieving repository 'openSUSE-Aliyun-OSS' metadata ................[done]
Building repository 'openSUSE-Aliyun-OSS' cache .....................[done]
Retrieving repository 'openSUSE-Aliyun-UPDATE-NON-OSS' metadata .....[done]
Building repository 'openSUSE-Aliyun-UPDATE-NON-OSS' cache ..........[done]
Retrieving repository 'openSUSE-Aliyun-UPDATE-OSS' metadata .........[done]
Building repository 'openSUSE-Aliyun-UPDATE-OSS' cache ..............[done]
All repositories have been refreshed.USTC mirros 中科大软件源：
sudo zypper ar -fcg https://mirrors.ustc.edu.cn/opensuse/distribution/leap/15.2/repo/oss USTC:15.2:OSS
sudo zypper ar -fcg https://mirrors.ustc.edu.cn/opensuse/distribution/leap/15.2/repo/non-oss USTC:15.2:NON-OSS
sudo zypper ar -fcg https://mirrors.ustc.edu.cn/opensuse/update/leap/15.2/oss USTC:15.2:UPDATE-OSS
sudo zypper ar -fcg https://mirrors.ustc.edu.cn/opensuse/update/leap/15.2/non-oss USTC:15.2:UPDATE-NON-OSSpacman 清华大学 pacman 软件源：
sudo zypper ar -fcg https://mirrors.tuna.tsinghua.edu.cn/packman/suse/openSUSE_Leap_15.2/ TUNA:15.2:PACKMAN
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