1. 도커 레포지토리 등록

$ 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

$ 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

2. 도커 패키지 설치

sudo apt-get install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin -y

3. 도커 설치여부 확인

sudo docker run hello-world 

4. 도커 실행상태 확인

sudo systemctl status docker

**q**를 입력하면 빠져나와집니다.