[root@node3 ~]# yum -y install make gcc
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
* base: centos.ustc.edu.cn
* extras: centos.ustc.edu.cn
* updates: centos.ustc.edu.cn
http://mirror.jdcloud.com/centos/7.6.1810/os/x86_64/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: mirror.jdcloud.com; Unknown error"
Trying other mirror.
http://mirrors.zju.edu.cn/centos/7.6.1810/os/x86_64/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: mirrors.zju.edu.cn; Unknown error"
Trying other mirror.
http://mirror.bit.edu.cn/centos/7.6.1810/os/x86_64/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: mirror.bit.edu.cn; Unknown error"
Trying other mirror.
http://mirrors.neusoft.edu.cn/centos/7.6.1810/os/x86_64/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: mirrors.neusoft.edu.cn; Unknown error"
Trying other mirror.
http://mirror.lzu.edu.cn/centos/7.6.1810/os/x86_64/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: mirror.lzu.edu.cn; Unknown error"
Trying other mirror.
http://mirrors.cn99.com/centos/7.6.1810/os/x86_64/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: mirrors.cn99.com; Unknown error"
Trying other mirror.
http://mirrors.163.com/centos/7.6.1810/os/x86_64/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: mirrors.163.com; Unknown error"
Trying other mirror.
http://centos.ustc.edu.cn/centos/7.6.1810/os/x86_64/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: centos.ustc.edu.cn; Unknown error"
Trying other mirror.
http://mirrors.huaweicloud.com/centos/7.6.1810/os/x86_64/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: mirrors.huaweicloud.com; Unknown error"
Trying other mirror.
http://mirrors.cqu.edu.cn/CentOS/7.6.1810/os/x86_64/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: mirrors.cqu.edu.cn; Unknown error"
Trying other mirror.
http://mirrors.aliyun.com/centos/7.6.1810/extras/x86_64/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: mirrors.aliyun.com; Unknown error"
Trying other mirror.
http://mirror.jdcloud.com/centos/7.6.1810/extras/x86_64/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: mirror.jdcloud.com; Unknown error"
Trying other mirror.
http://mirrors.tuna.tsinghua.edu.cn/centos/7.6.1810/extras/x86_64/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: mirrors.tuna.tsinghua.edu.cn; Unknown error"
解决方法 基本的配置检查 查看详细报错信息
vi /etc/resolv.conf
nameserver 114.114.114.114