Running Dual
Dual doesn't come with no graphical user interface. This means you have to run this program using a terminal.
Running Dual is very easy:
$ java -jar Dual.jar
If you are on Windows, ignore the $ bit.
And there you go!
Using a script
If you are on Linux, you can create a script to make the Dual launch process easier:
#!/bin/sh
java -jar Dual.jar
Save your script with some name, like dual.sh, and make sure it's executable. To make the script executable, run the following command (assuming you are running it under the same user that owns the script):
chmod u+x dual.sh
Now you can run Dual by running your script:
$ ./dual.sh