docker 安装

更换国内镜像

虚拟机是刚刚安装的，需要先更换成国内镜像源。

•  sudo chmod 777 /etc/apt/sources.list  修改权限
•  sudo gedit /etc/apt/sources.list 打开文件进行编辑，我选择的是阿里源，复制粘贴保存即可

deb http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse

deb-src http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse

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

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

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

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

docker 安装步骤

1. 卸载可能存在的旧版本  sudo apt-get remove docker docker-engine docker-ce docker.io
2. 更新apt索引 sudo apt-get update
3. 安装包使得apt可以通过HTTPS使用存储库 sudo apt-get install -y apt-transport-https ca-certificates curl software-properties-common
4. 添加Docker官方的GPG** curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
5. 设置stable存储库 sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
6. 再次更新apt索引 sudo apt-get update
7. 安装最新版本的Docker CE sudo apt-get install -y docker-ce