[root@zh ~]# 
[root@zh ~]# 
[root@zh ~]# yum -y install docker
上次元数据过期检查：0:08:25 前，执行于 2020年08月05日 星期三 20时28分10秒。
未找到匹配的参数： docker
错误：没有任何匹配: docker
[root@zh ~]# 

[root@zh ~]# 
[root@zh ~]# 
[root@zh ~]# 
[root@zh ~]# ping www.baodu.com
PING www.baodu.com (115.29.223.128) 56(84) bytes of data.
64 bytes from 115.29.223.128 (115.29.223.128): icmp_seq=1 ttl=55 time=23.7 ms
64 bytes from 115.29.223.128 (115.29.223.128): icmp_seq=2 ttl=55 time=23.6 ms
64 bytes from 115.29.223.128 (115.29.223.128): icmp_seq=3 ttl=55 time=23.7 ms
64 bytes from 115.29.223.128 (115.29.223.128): icmp_seq=4 ttl=55 time=23.6 ms
^C
--- www.baodu.com ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 8ms
rtt min/avg/max/mdev = 23.637/23.660/23.700/0.024 ms
[root@zh ~]# 

yum install https://download.docker.com/linux/fedora/30/x86_64/stable/Packages/containerd.io-1.2.6-3.3.fc30.x86_64.rpm

curl https://download.docker.com/linux/centos/docker-ce.repo -o /etc/yum.repos.d/docker-ce.repo

yum install https://download.docker.com/linux/fedora/30/x86_64/stable/Packages/containerd.io-1.2.6-3.3.fc30.x86_64.rpm

yum install docker-ce -y

systemctl start docker