网络yum源配置

1.下载yum源

wget http://mirrors.163.com/.help/CentOS6-Base-163.repo
mv CentOS-Base.repo CentOS-Base.repo.ori
yum clean all
yum makecache
yum repolist
yum -y install lrzsz

附:镜像站点-->点击centos使用帮助-->选择对应版本CentOs下载

问题1

Cannot find a valid baseurl for repo: base/7/x86_64