How To Install and Use Docker on Ubuntu 20.04 Step 1

How To Install and Use Docker on Ubuntu 20.04 Step 1 — Installing Docker

Output of apt-cache policy docker-ce

docker-ce:
  Installed: (none)
  Candidate: 5:19.03.9~3-0~ubuntu-focal
  Version table:
     5:19.03.9~3-0~ubuntu-focal 500
        500 https://download.docker.com/linux/ubuntu focal/stable amd64 Packages

How To Install and Use Docker on Ubuntu 20.04 Step 5 — Running a Docker Container

As an example, let’s run a container using the latest image of Ubuntu. The combination of the -i and -t switches gives you interactive shell access into the container:

docker run -it ubuntu

How To Install and Set Up Laravel with Docker Compose on Ubuntu 20.04 Step 5 — Creating a Multi-Container Environment with Docker Compose

Create a new docker-compose.yml file at the root of the application folder:

nano docker-compose.yml

How To Install and Use Docker on Ubuntu 20.04 Step 6 — Managing Docker Containers

The container will start, and you can use docker ps to see its status:

OutputCONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES
1c08a7a0d0e4        ubuntu              "/bin/bash"         3 minutes ago       Up 5 seconds                            quizzical_mcnulty

How To Install and Set Up Laravel with Docker Compose on Ubuntu 20.04 Step 5 — Creating a Multi-Container Environment with Docker Compose

docker-compose.yml

version: "3.7"
services:


networks:
  travellist:
    driver: bridge

How To Install and Use Docker on Ubuntu 20.04 Step 5 — Running a Docker Container

This installs Node.js in the container from the official Ubuntu repository. When the installation finishes, verify that Node.js is installed:

node -v

How To Install and Use Docker on Ubuntu 20.04 Step 5 — Running a Docker Container

Your command prompt should change to reflect the fact that you’re now working inside the container and should take this form:

Outputroot@d9b100f2f636:/#

How To Install and Use Docker on Ubuntu 20.04 Step 5 — Running a Docker Container

Now you can run any command inside the container. For example, let’s update the package database inside the container. You don’t need to prefix any command with sudo, because you’re operating inside the container as the root user: