1.为了方便配置,可以安装setup

yum install -y setuptool ntsysv system-config-firewall-tui system-config-network-tui

2.安装wget

yum install -y wget

3.更换源

cd /etc/yum.repos.d
mv CentOS-Base.repo bak-CentOS-Base.repo
wget http://mirrors.163.com/.help/CentOS6-Base-163.repo
yum clean all
yum makecache

4.更新yum

yum -y update

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