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Setting up default-jdk-headless (2:1.11-72build2). Install the JDK with the following command: sudo apt install default-jdk The Java Development Kit (JDK) provides everything a user needs to run Java applications.

The full Java suite includes the Java Runtime Environment (JRE), Java Virtual Machine (JVM) and utilities to develop Java source code.

Fix the “ServerRoot Must be a Valid Directory” error.

Why you should choose Apache as your HTTP web server.

Follow a simple docker-compose with httpd example.

Run Docker images from the command line.

Master the fundamentals of Apache, Docker and Kubernetes technology. Update your package listing with apt updateĪs with all Ubuntu software installs, update your Ubuntu package list with the most recent information with the following command: sudo apt-get update If this command indicates that Java is not found, then it’s not installed and you can proceed with the next steps. In the name of due diligence, first check to see if Java is already installed by issuing the following command: java - versionĬommand 'java' not found, but can be installed with: You don’t need to setup Java on Ubuntu if someone has already installed it for you.

Set JAVA_HOME globally for all Ubuntu usersĭo you even need to setup Java on Ubuntu?.Run Java on the command line to test the install.Verify that you have not already installed Java.To quickly setup and install Java on Ubuntu, follow these steps: There are many different ways to install Java on Ubuntu, but if all you need is the ability to run a Java program or even develop and compile some Java source code, the apt-based installation path is the easiest one to follow.