我要评论安装工具时,执行#yum install -y yum-utils时，报错
注意：是服务器连接不到网络，需要配置镜像源
打开etc目录下的配置文件
编辑centos-base.repo文件
将内容改为
[base] name=centos-$releasever - base baseurl=https://mirrors.aliyun.com/centos/$releasever/os/$basearch/ gpgcheck=1 gpgkey=https://mirrors.aliyun.com/centos/rpm-gpg-key-centos-7 [updates] name=centos-$releasever - updates baseurl=https://mirrors.aliyun.com/centos/$releasever/updates/$basearch/ gpgcheck=1 gpgkey=https://mirrors.aliyun.com/centos/rpm-gpg-key-centos-7 [extras] name=centos-$releasever - extras baseurl=https://mirrors.aliyun.com/centos/$releasever/extras/$basearch/ gpgcheck=1 gpgkey=https://mirrors.aliyun.com/centos/rpm-gpg-key-centos-7 [centosplus] name=centos-$releasever - plus baseurl=https://mirrors.aliyun.com/centos/$releasever/centosplus/$basearch/ gpgcheck=1 enabled=0 gpgkey=https://mirrors.aliyun.com/centos/rpm-gpg-key-centos-7 ~
修改后，清除yum缓存
# yum clean all
再次执行就可以正常安装
总结
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