Could not resolve host: mirrorlist.centos.org

执行 [root@localhost yum.repos.d]# yum install bind-utils时，报centos-release-scl-rh Could not resolve host: mirrorlist.centos.org; Unknown error

• 解决上面问题

[root@localhost ~]# cd /etc/yum.repos.d
[root@localhost yum.repos.d]# ls
CentOS-Base.repo      CentOS-CR.repo         CentOS-fasttrack.repo  CentOS-SCLo-scl.repo      CentOS-SCLo-scl-rh.repo      CentOS-Sources.repo  CentOS-x86_64-kernel.repo  epel-testing.repo
CentOS-Base.repo.bak  CentOS-Debuginfo.repo  CentOS-Media.repo      CentOS-SCLo-scl.repo.bak  CentOS-SCLo-scl-rh.repo.bak  CentOS-Vault.repo    epel.repo## 备份 CentOS-SCLo-scl-rh.repo和CentOS-SCLo-scl.repo
[root@localhost yum.repos.d]# cp CentOS-SCLo-scl-rh.repo CentOS-SCLo-scl-rh.repo.bak
[root@localhost yum.repos.d]# cp CentOS-SCLo-scl.repo CentOS-SCLo-scl.repo.bak