虚拟机Centos7：Cannot find a valid baseurl for repo: base/7/x86_64问题解决

• 问题
  

• 解决：更新yum仓库源

  # 备份现有yum配置文件
  sudo cp -r /etc/yum.repos.d /etc/yum.repos.d.backup# 编辑CentOS-Base.repo文件
  vi /etc/yum.repos.d/CentOS-Base.repo[base]
  name=CentOS-$releasever - Base
  baseurl=http://mirrors.aliyun.com/centos/$releasever/os/$basearch/
  gpgcheck=1
  gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7[updates]
  name=CentOS-$releasever - Updates
  baseurl=http://mirrors.aliyun.com/centos/$releasever/updates/$basearch/
  gpgcheck=1
  gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7[extras]
  name=CentOS-$releasever - Extras
  baseurl=http://mirrors.aliyun.com/centos/$releasever/extras/$basearch/
  gpgcheck=1
  gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7[centosplus]
  name=CentOS-$releasever - Plus
  baseurl=http://mirrors.aliyun.com/centos/$releasever/centosplus/$basearch/
  gpgcheck=1
  enabled=0
  gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7