报错1 Status code:404forhttp://mirrors.cloud.aliyuncs.com/centos/8/AppStream/x86_64/os/repodata/repomd.xml 解决 cd /etc/yum.repos.d/foriin`ls`;dosed-i's/mirrors.cloud.aliyuncs.com/mirrors.aliyun.com/g'$i;doneforiin