# Install Docker


## インストール
頻繁に更新されるので[公式ページ](https://docs.docker.com/engine/install/ubuntu/)参照を**推奨**

```bash
# Add Docker's official GPG key:
$ sudo apt-get update
$ sudo apt-get install ca-certificates curl gnupg
$ sudo install -m 0755 -d /etc/apt/keyrings
$ curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
$ sudo chmod a+r /etc/apt/keyrings/docker.gpg

# Add the repository to Apt sources:
$ echo \
  "deb [arch="$(dpkg --print-architecture)" signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu \
  "$(. /etc/os-release && echo "$VERSION_CODENAME")" stable" | \
  sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
$ sudo apt-get update

# Install the latest version
$ sudo apt-get install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
```


## sudo不要の設定
sudo なしで dockerコマンド実行できるようにする
```bash
# Omission of sudo
$ sudo usermod -aG docker $USER

## restart docker demon
$ sudo systemctl restart docker
$ reboot
```


## インストールの確認
```bash
# Check version
$ docker --version
Docker version 24.0.7, build xxxxxxx

# Verify that the Docker Engine installation is successful by running the hello-world image
$ sudo docker run --rm hello-world
```
<img src="./img/install_docker_0.jpg" class="img-align2">