Docker is one of the most important development tools over the last 10 years. In this article, we will summarize how to install docker on ubuntu.
To install docker, simply type in the following commands
sudo apt update
sudo apt install -y docker.io
By default, docker needs root access to run. If you are the root, you don’t need this section. Otherwise, you can use sudo in front of each docker command to make it work. To avoid typeing sudo every time you run docker command, take the following steps.
- Create a docker group
sudo groupadd docker
- Add your user to the docker group
sudo usermod -aG docker $USER
- Restart docker
systemctl restart docker
To check if your docker is successfully installed, just do
docker run hello-world
If you see something like the following, it means your docker is functioning
Unable to find image 'hello-world:latest' locally
latest: Pulling from library/hello-world
2db29710123e: Pull complete
Status: Downloaded newer image for hello-world:latest
Hello from Docker!
This message shows that your installation appears to be working correctly.
To generate this message, Docker took the following steps:
1. The Docker client contacted the Docker daemon.
2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
3. The Docker daemon created a new container from that image which runs the
executable that produces the output you are currently reading.
4. The Docker daemon streamed that output to the Docker client, which sent it
to your terminal.
To try something more ambitious, you can run an Ubuntu container with:
$ docker run -it ubuntu bash
Share images, automate workflows, and more with a free Docker ID:
For more examples and ideas, visit: