Introduction
Katalon Studio was first released in 2015. It is a robust automation tool. It is an open-source and free testing tool. It is an all-in-one platform for automated testing for low-code web, API, mobile, and desktop (Windows).

This article will discuss the installation of Katalon studio for Linux(GUI). We will discuss the system requirements. Further, we will discuss how to download, start, and activate the Katalon Studio.
Requirements
You can use Katalon Studio with a GUI on your Linux if you use Linux or wish to test your build there. Any current Linux distribution that supports the Gnome, KDE, or Unity Desktop Environments can use Katalon Studio for Linux.
First, you need a valid email address to create a Katalon Account.
You must install Katalon Studio with an active Internet connection.
Katalon Studio Environment Requirements
You should prepare your environment before installing Katalon Studio for Linux. Follow the given steps:
🧩 Step 1: For the app to operate efficiently, you must have at least 2 GB RAM (32-bit) or 4 GB RAM (64-bit).
🧩 Step 2: Install the OpenJDK 8 (NOT Oracle JDK).
Open the Terminal on your Ubuntu desktop to install OpenJDK 8.
Type the following command into the cmd prompt.
sudo apt-get install openjdk-8-jre
Once the installation is complete, the information about your OpenJDK is shown when you use the java -version command.
Using the alternatives command, you can switch between several OpenJDK versions if the proper one isn't being utilised on your system despite having numerous versions installed:
sudo update-alternatives --config java //then choose the openjdk-8-jre option
Troubleshooting
In the system requirements, it has been mentioned to use openJDK8, not Oracle JDK. Due to Oracle JDK's use, you can get the NoClassDefFoundError warning. Follow these steps to fix this problem:
🎯 Step 1: Uninstall the Oracle JDK.
🎯 Step 2: Install the OpenJDK 8.