错误：为仓库 'AppStream' 下载元数据失败 : Cannot prepare internal mirrorlist: No URLs in mirrorlist

目录

一、域名解析

先验证 ping www.baidu.com  不ok则添加域名解析，ok的页建议

[root@localhost ~]# vim  /etc/resolv.conf

nameserver 8.8.8.8
nameserver 114.114.114.114

重启网络服务，如有启动不成功(centos版本问题，不支持，)

添加镜像源，并更新rpm

不支持：

[root@localhost ~]# service network restart
Redirecting to /bin/systemctl restart network.service

则尝试：service networking restart        或者

[root@localhost yum.repos.d]# nmcli c reload

二、CentOS-AppStream.repo

#[AppStream]
#name=CentOS-$releasever - AppStream
#mirrorlist=
#baseurl=
#gpgcheck=1
#enabled=1
#gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial

[AppStream]
name=CentOS-$releasever - AppStream
baseurl=
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial

三、CentOS-Base.repo

#[BaseOS]
#name=CentOS-$releasever - Base
#mirrorlist=
#baseurl=
#gpgcheck=1
#enabled=1
#gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial

[BaseOS]
name=CentOS-$releasever - Base
baseurl=
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial

四、CentOS-Extras.repo

#additional packages that may be useful
[extras]
#name=CentOS-$releasever - Extras
#mirrorlist=
#baseurl=
#gpgcheck=1
#enabled=1
#gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial

name=CentOS-$releasever - Extras
baseurl=
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial

五、rpm更新

[root@localhost yum.repos.d]# dnf update dnf rpm -y

六、再次尝试之前的命令

如docker安装： 

sudo yum install -y yum-utils