----------更换国内比较快的yum源---------------------163---------cd /etc/yum.repos.dmv CentOS-Base.repo CentOS-Base.repo.backupwget http://mirrors.163.com/.help/CentOS6-Base-163.repomv CentOS6-Base-163.repo CentOS-Base.repo//rm -rf cloudera-cdh5.repo//wget http://archive.cloudera.com/cdh5/redhat/6/x86_64/cdh/cloudera-cdh5.repo---------Peer cert cannot be verified or peer cert invalid错误---vi /etc/yum.conf---------yum.conf 增加参数 -------sslverify=false-------------------------------------yum check-update yum -y install openssh-clients #最小版centos安装ssh
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