Docker安装

cat /etc/redhat-release

yum -y install gcc
  yum -y install gcc-c++

yum install -y yum-utils

yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

yum makecache fast

yum -y install docker-ce docker-ce-cli containerd.io

systemctl start docker

docker version
 docker run hello-world

systemctl stop docker 
 yum remove docker-ce docker-ce-cli containerd.io 
 rm -rf /var/lib/docker
 rm -rf /var/lib/containerd

systemctl daemon-reload
  systemctl restart docker