查看系统内核：uname -r
    查看系统环境：cat /etc/os-release

    1. yum remove docker \
    2.                   docker-client \
    3.                   docker-client-latest \
    4.                   docker-common \
    5.                   docker-latest \
    6.                   docker-latest-logrotate \
    7.                   docker-logrotate \
    8.                   docker-engine

    image.png

    1. yum install -y yum-utils
    1. yum-config-manager \
    2.     --add-repo \
    3.     http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
    1. yum install docker-ce docker-ce-cli containerd.io
    1. systemctl start docker
    1. docker version
    1. docker run hello-world

    ![OJ~(%`]~(]45SDXZ8E_)KI.png

    1. docker images
    1. sudo mkdir -p /etc/docker
    1. sudo tee /etc/docker/daemon.json <<-'EOF'
    2. {
    3.   "registry-mirrors": ["https://ukbwllh8.mirror.aliyuncs.com"]
    4. }
    5. EOF

    重新加载docker的配置文件 （因为docker归属于 systemctl 管理，要想docker的服务程序配置文件生效，需重新加载）

    1. sudo systemctl daemon-reload
    1. sudo systemctl restart docker