更换163的yum源

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

#python3　进行pip安装时使用豆瓣的源

pip3 install tornado -i https://pypi.douban.com/simple/

#Centos x64 6.9下载mini版本

http://mirrors.sohu.com/centos/6.9/isos/x86_64/CentOS-6.9-x86_64-minimal.iso

#安装

yum install sysstat -y

更换163的yum源

原文：http://www.cnblogs.com/littlehb/p/7748125.html