How To Install Docker Engine On Ubuntu Server

Install Docker on Ubuntu Server

If you have any of these ubuntu versions, you can proceed:

• Ubuntu Jammy 22.04
• Ubuntu Impish 21.10
• Ubuntu Focal 20.04
• Ubuntu Bionic 18.04

First check for old docker versions and uninstall by running in cli

• Install using repository for ease of installation and upgrade tasks.

• Set up repository 
  run :

$ sudo apt update
$ sudo apt-get install \ ca-certificates \ curl \ gnupg \ lsb-release

• Add Docker’s official GPG key: 

$ curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg

• Set up stable repository with: 

$ echo \"deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/ubuntu \ $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

• Install Docker Engine: 

$ sudo apt-get update
$ sudo apt-get install docker-ce docker-ce-cli containerd.io docker-compose-plugin

The above code auto installs the latest version but to install a specific version, list the versions available by running:

$ apt-cache madison docker-ce

After, run this

 $ sudo apt-get install docker-ce=<VERSION_STRING> docker-ce-cli=<VERSION_STRING> containerd.io docker-compose-plugin 

where VERSION_STRING is what comes after docker-ce | and before | https... in the list of versions available.

• To verify Docker Engine is installed: 
  run :

 $ sudo docker run hello-world

If you get an error: 
Cannot connect to the Docker daemon at unix:/var/run/docker.sock. Is the docker daemon running?
Check status by running:

$ sudo systemctl status docker

If you get an error: 
System has not been booted with systemd as init system (PID 1). Can't operate. Failed to connect to bus: Host is down
Run this cmd if using Ubuntu 20.4 & Docker 20.10.11:

$ sudo service docker start
$ sudo docker run hello-world

and response should contain 
... Hello from Docker! This message shows that your installation appears to be working correctly ...

• To uninstall Docker,

• Uninstall the Docker Engine, CLI, Containerd, and Docker Compose packages:

$ sudo apt-get purge docker-ce docker-ce-cli containerd.io docker-compose-plugin

• To delete images, containers, volumes, or customized configuration files on your host that are not automatically deleted after running that, run :

$ sudo rm -rf /var/lib/docker
$ sudo rm -rf /var/lib/containerd

• To run Docker without root privileges,

run $ sudo groupadd docker
run $ sudo usermod-aG docker $USER 

where $USER is your ubuntu username.

reference url: None
published at: May 15, 2022, 9 a.m.

Post Category: Installations