# ubuntu 安装 docker-ce

## step 1: 安装必要的一些系统工具

sudo apt update
sudo apt -y install apt-transport-https ca-certificates curl software-properties-common

## step 2: 安装GPG证书

curl -fsSL http://mirrors.aliyun.com/docker-ce/linux/ubuntu/gpg | sudo apt-key add -

## Step 3: 写入软件源信息

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

## Step 4: 更新并安装 Docker-CE

sudo apt -y update
sudo apt -y install docker-ce


## 加速

``` bash
sudo mkdir -p /etc/docker
sudo tee /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": ["https://so4p5nnk.mirror.aliyuncs.com"]
}
EOF
sudo systemctl daemon-reload
sudo systemctl restart docker
```

## login

``` bash
docker login registry.cn-hangzhou.aliyuncs.com

## not to type sudo

``` bash

cat /etc/group
# if docker grouo not exist , then run this command: sudo groupadd docker

sudo gpasswd -a ${USER} docker
# add me into docker group

sudo service docker restart

reboot  # or relogin

```