Alternatively, you can use curl with the -O flag to save the file with its original name: curl -O https://example.com Use code with caution. 2. Preparing Ubuntu to Run JAR Files
Once you have both the file and the Java environment ready, you can run the JAR file using either the terminal or the graphical user interface (GUI). Method A: Using the Terminal (Recommended)
To download a JAR file on Ubuntu, you can use command-line utilities like or curl , which are highly efficient for retrieving files directly from a URL. Once downloaded, you must have the Java Runtime Environment (JRE) installed to execute the file. 1. How to Download a JAR File via Terminal ubuntu download jar file
java -jar your-file-name.jar ``` *Note: If you encounter a permission error, you may need to make the file executable first with `chmod +x your-file-name.jar`.* #### Method B: Using the GUI 1. Open your **File Manager** and locate the JAR file. 2. Right-click the file and select **Properties**. 3. Go to the **Permissions** tab and check the box **"Allow executing file as program"**. 4. Right-click the file again, select **Open With Other Application**, and choose **OpenJDK Java Runtime**. ### Summary of Commands | Action | Command | | :--- | :--- | | **Download** | `wget [URL]` | | **Install Java** | `sudo apt install default-jre` | | **Run JAR** | `java -jar [filename].jar` | | **Set Permissions** | `chmod +x [filename].jar` | For more advanced setups, such as running a JAR file as a background service or creating a desktop shortcut, you can refer to community guides on [Medium](https://medium.com/programming-with-pierre/start-a-java-service-from-jar-on-an-ubuntu-instance-40dff8acc4a5) or [Ask Ubuntu](https://askubuntu.com/questions/372762/how-to-install-a-jar-file). Would you like help **automating this download** with a bash script? Use code with caution. How to run EXE and JAR files on Ubuntu
If it is not installed, use the following commands to install the default JRE: sudo apt update Install the JRE: sudo apt install default-jre 3. How to Execute the Downloaded JAR File Alternatively, you can use curl with the -O
Use the -P flag to specify a destination path. For example: wget -P ~/Downloads/jars https://example.com ``` Use code with caution.
JAR files (Java ARchive) require Java to function. You can check if Java is already installed by running java -version . Method A: Using the Terminal (Recommended) To download
Navigate to the folder where you downloaded the file and run: