操作系统：Ubuntu 20.04.6 LTS

更新apt

sudo apt update

删除旧版本docker

sudo apt-get remove docker docker-engine docker.io

安装docker

sudo apt install docker.io

查看docker版本 

docker --version

启动docker

• 启动docker

 sudo systemctl start docker

• 启用docker

sudo systemctl enable docker

• 查看docker状态

sudo systemctl status docker

停止docker

• 禁用docker

sudo systemctl disable docker

• 停止docker

sudo systemctl stop docker

卸载❓docker 

sudo apt-get remove docker docker-engine docker.io

sudo apt-get remove docker.ce

 配置docker镜像

打开配置文件

sudo vim  /etc/docker/daemon.json

添加国内镜像

daemon.json添加以下配置

{"registry-mirrors": ["https://hub-mirror.c.163.com","https://mirror.baidubce.com","https://ccr.ccs.tencentyun.com"]
}

重启docker

sudo systemctl daemon-reload
sudo systemctl restart docker

查看docker信息

sudo docker info