Installing GlassFish on Ubuntu 20.04

GlassFish is an open-source application server that provides support for Java EE (Enterprise Edition) applications. It is developed by Oracle and offers features such as clustering, scalability, and high availability for enterprise-level applications.

Prerequisites

• Ubuntu 20.04 installed on your system
• Java Development Kit (JDK) installed

Step 1: Update the System

Before installing GlassFish, it is recommended to update the system packages to their latest versions. Open a terminal and run the following commands:

sudo apt update
sudo apt upgrade -y

Step 2: Install GlassFish

To install GlassFish, you need to download the appropriate version from the official website. Visit the GlassFish Downloads page (https://javaee.github.io/glassfish/download) and select the latest stable version. Copy the download link for the platform-independent ZIP file.

cd ~
wget -O glassfish.zip [paste URL here]

Once the download is complete, unzip the file using the following command:

unzip glassfish.zip

Step 3: Configure GlassFish

After extracting the ZIP file, you need to configure GlassFish before starting it. Change to the GlassFish installation directory:

cd glassfish5

Set the executable permissions for the `asadmin` script:

chmod +x bin/asadmin

Start the GlassFish domain configuration:

bin/asadmin start-domain

Step 4: Verify GlassFish Installation

To verify that GlassFish is installed properly, access the GlassFish administration console from your web browser:

http://localhost:4848

If the administration console opens successfully, it means that GlassFish is installed and running.

Step 5: Access GlassFish Application

You can access the GlassFish application from your web browser with the following URL:

http://localhost:8080

By default, GlassFish displays a page with version information to confirm that it is running properly.

Conclusion

You have successfully installed GlassFish on Ubuntu 20.04. GlassFish provides a robust platform for developing and deploying Java EE applications with features like clustering and high availability.