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备份CentOS-Base.repo
mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
进入配置文件文件夹
cd /etc/yum.repos.d/
下载配置文件
163:
wget http://mirrors.163.com/.help/CentOS6-Base-163.repo
aliyun
centos5:
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-5.repo
centos6:
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo
centos7:
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
清理
yum clean all
更新缓存
yum makecache
yum install tree -y
yum update -y