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官方下载安装链接

https://docs.docker.com/engine/install/ubuntu/

1.查看系统版本，并与之与docker文档对应

OS requirements# 查看系统版本命令
lsb_release -a

2.卸载旧版本

Uninstall old versions

3.安装新版本

Installation methods
Install using the apt repository

4.启动和校验

# 启动Docker
systemctl start docker# 停止Docker
systemctl stop docker# 重启
systemctl restart docker# 设置开机自启
systemctl enable docker# 执行docker ps命令，如果不报错，说明安装启动成功
docker ps

5.配置镜像加速

# 创建目录
mkdir -p /etc/docker# 复制内容
tee /etc/docker/daemon.json <<-'EOF'
{"registry-mirrors": ["http://hub-mirror.c.163.com","https://mirrors.tuna.tsinghua.edu.cn","http://mirrors.sohu.com","https://ustc-edu-cn.mirror.aliyuncs.com","https://ccr.ccs.tencentyun.com","https://docker.m.daocloud.io","https://docker.awsl9527.cn"]
}
EOF# 重新加载配置
systemctl daemon-reload# 重启Docker
systemctl restart docker