Ubuntu18.04安装docker

1. 先更新Ubuntu系统apt-get的镜像源，可以提升更新安装速度

• 原文件备份

  sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak

• 编辑源列表文件

  sudo gedit /etc/apt/sources.list

• 将原来的列表删除，添加如下内容（阿里镜像源）

  deb http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
  deb-src http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
  deb http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
  deb-src http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
  deb http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse
  deb-src http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse
  deb http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse
  deb-src http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multivers
  deb http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse
  deb-src http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse

• 运行 sudo apt-get update

  如果出错：

  E: 无法获得锁 /var/lib/apt/lists/lock - open (11: 资源暂时不可用)
  E: 无法对目录 /var/lib/apt/lists/ 加锁

  解决方案：

  sudo rm /var/lib/apt/lists/lock

2. 安装Docker

• 更新系统软件：sudo apt-get update

  

• 安装依赖包

  sudo apt-get install apt-transport-https ca-certificates curl gnupg-agent software-properties-common

• 添加 Docker 的官方 GPG 密钥

  curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -

• 验证您现在是否拥有带有指纹的密钥

  sudo apt-key fingerprint 0EBFCD88

• 设置稳定版仓库

  sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"

• 更新

  $ sudo apt-get update

• 安装最新的Docker-ce

  sudo apt-get install docker-ce

• 启动

  sudo systemctl enable docker
  sudo systemctl start docker

• 重启 docker 服务

  $ sudo service docker restart

• 查看Docker版本

  sudo docker version or sudo docker -v
  

3. 配置Docker镜像加速器

• 修改配置文件：/etc/docker/daemon.json，写入你的阿里云或者其他云的加速器即可

    sudo docker gedit /etc/docker/daemon.json
  

  

• 重启Docker生效

    sudo systemctl daemon-reload
    sudo systemctl restart docker