centos7 安装docker
1 curl -sSL https://get.docker.com/ | sh
2 将已经存在的用户加到docker group, usermod -a -G docker cheng
3 启动,sudo systemctl start docker
4 加入到开机启动 ,systemctl enable docker
5 查看docker版本, docker version
1 curl -sSL https://get.docker.com/ | sh
2 将已经存在的用户加到docker group, usermod -a -G docker cheng
3 启动,sudo systemctl start docker
4 加入到开机启动 ,systemctl enable docker
5 查看docker版本, docker version