centos8 升级openSSH版本，升级到9.1以上

备份源

cd /etc/yum.repos.d/
mkdir abc
mv CentOS-Stream* abc/
mv clickhouse.repo abc/
mv epel-modular.repo abc/
mv epel-playground.repo abc/
mv epel-testing* /abc

跟新源
https://developer.aliyun.com/mirror/centos?spm=5176.2020520104.0.0.723a43ecPMQSbc

升级步骤

https://www.cnblogs.com/patrick-yeh/articles/17511311.html