centos6.9 源

参考博客：https://blog.csdn.net/weixin_42104211/article/details/112228242

[root@hadoop02 ~]# yum install -y openssh-clients
Loaded plugins: fastestmirror
Determining fastest mirrors
YumRepo Error: All mirror URLs are not using ftp, http[s] or file.
 Eg. Invalid release/repo/arch combination/
removing mirrorlist with no valid mirrors: /var/cache/yum/x86_64/6/base/mirrorlist.txt
Error: Cannot find a valid baseurl for repo: base