Docker is an open-source platform for Building, Shipping and Running applications using container virtualization technology. Docker is a software package that simplifies the process of managing application processes in containers. Container technology refers to a lightweight, portable, resource friendly, stand-alone, executable package of a software that contains all the libraries, configuration files, dependencies, and other mandatory parts to operate the application. In this tutorial, learn how to Install Docker Engine on Ubuntu 18.04/20.04.
There are two versions of Docker:
- Docker CE (Community Edition)
- Docker EE (Enterprise Edition)
If you have a small-scale project, or you’re just learning, you can use Docker CE.
Prerequisite
- Ubuntu 18.04/20.04operating system
- A user with root level privilege
Method:1. Install Docker on Ubuntu Using Ubuntu Official Repositories
It’s better to update the local database of software to make sure you’ve got access to the latest revisions.
$ sudo apt update
To install Docker Engine on Ubuntu, in terminal window please enter the below command.
$ sudo apt install docker.io
The below commands will start Docker and ensure that it starts after the reboot.
$ sudo systemctl start docker
$ sudo systemctl enable docker
To verify the proper installation of Docker on Ubuntu, please enter the below commands.
$ docker --version
Method:2. Install Docker on Ubuntu Using Docker Official Repositories
Let’s update the local repository and install prerequisite dependencies.
$ sudo apt update
$ sudo apt install apt-transport-https ca-certificates curl gnupg-agent software-properties-common
We need to add GPG Key to ensure that the software you are installing is authentic and install docker repository using below command.
$ curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
$ sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
Once, Key and docker repository imported, update ubuntu local DB again.
$ sudo apt update
You can simply install docker CE using below command.
$ sudo apt install docker-ce
To check docker version.
$ docker --version
Method:3. Install Specific Version of Docker Engine (Optional)
Using below command list the available versions of Docker.
$ sudo apt-cache madison docker-ce
We will get the all available versions of Docker. To install specific version of docker, enter below command and replace that specific version here in highlighted text.
$ sudo apt install docker-ce=<version_string>
Conclusion
Hence, in this tutorial you leaned how to install Docker Engine on Ubuntu. I hope I helped… Thanks!!
Read Also: How To Install Jenkins on Ubuntu 20.04
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