How To Install default-jdk-headless on Ubuntu 20.04

In this tutorial we learn how to install default-jdk-headless on Ubuntu 20.04. default-jdk-headless is Standard Java or Java compatible Development Kit (headless)

Introduction

In this tutorial we learn how to install default-jdk-headless on Ubuntu 20.04.

What is default-jdk-headless

default-jdk-headless is:

This dependency package points to the Java runtime, or Java compatible development kit recommended for this architecture, which is openjdk-11-jdk-headless for amd64.

The package is used as dependency for packages not needing a graphical display during runtime.

There are three methods to install default-jdk-headless on Ubuntu 20.04. We can use apt-get, apt and aptitude. In the following sections we will describe each method. You can choose one of them.

Install default-jdk-headless Using apt-get

Update apt database with apt-get using the following command.

sudo apt-get update

After updating apt database, We can install default-jdk-headless using apt-get by running the following command:

sudo apt-get -y install default-jdk-headless

Install default-jdk-headless Using apt

Update apt database with apt using the following command.

sudo apt update

After updating apt database, We can install default-jdk-headless using apt by running the following command:

sudo apt -y install default-jdk-headless

Install default-jdk-headless Using aptitude

If you want to follow this method, you might need to install aptitude first since aptitude is usually not installed by default on Ubuntu. Update apt database with aptitude using the following command.

sudo aptitude update

After updating apt database, We can install default-jdk-headless using aptitude by running the following command:

sudo aptitude -y install default-jdk-headless

How To Uninstall default-jdk-headless on Ubuntu 20.04

To uninstall only the default-jdk-headless package we can use the following command:

sudo apt-get remove default-jdk-headless

Uninstall default-jdk-headless And Its Dependencies

To uninstall default-jdk-headless and its dependencies that are no longer needed by Ubuntu 20.04, we can use the command below:

sudo apt-get -y autoremove default-jdk-headless

Remove default-jdk-headless Configurations and Data

To remove default-jdk-headless configuration and data from Ubuntu 20.04 we can use the following command:

sudo apt-get -y purge default-jdk-headless

Remove default-jdk-headless configuration, data, and all of its dependencies

We can use the following command to remove default-jdk-headless configurations, data and all of its dependencies, we can use the following command:

sudo apt-get -y autoremove --purge default-jdk-headless

References

Summary

In this tutorial we learn how to install default-jdk-headless package on Ubuntu 20.04 using different package management tools: apt, apt-get and aptitude.