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New to Ubuntu, using 18.04.

I'm trying to work out the best procedure for installing jwildfire flame fractal software. If you're interested go here http://jwildfire.org/

The install is just a bunch of files in a .zip file that just need to be unpacked into a directory. The app is launched by executing the j-wildfire-launcher.jar

Question 1 - Where should this be unpacked to, and why?

Question 2 - How to do this?

I've trawled through a bunch of forums and there seems to be no clear consensus as to where things should be installed. Many people say 'just let the installer choose the right place' but this has no installer, it's just a zip file with a java executable. When I try to use the Archive manager to unpack it into /opt or some such it throws a permissions error.

Any help appreciated

UbuMusic
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1 Answers1

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Question 1:

There is no definite answers of where to install, but if you want suggestion, I recommend place it to /home/<user>/j-wild-fire (replace <user> to your username) rather than /opt, since /opt require sudo permission to write, this is the reason why you can't create file inside /opt. If you want more about what sudo is, you can read this.

Question 2:

    1. open the terminal by press ctrl+alt+t
    1. install unzip and java if necessary, by enter the following command in terminal
sudo apt install unzip
sudo apt install default-jre
    1. unzip the file
unzip <location_of_your_zip_file> -d /home/<user>/j-wild-fire
    1. run the program
java -jar /home/<user>/j-wild-fire/j-wildfire-launcher.jar
    1. If you want to create launcher, you can follow this, and use the command in step.4
Community
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Wan Chap
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  • Up to point 3 this works fine. At point 4 I get an error "Error: unable to access jarfile j-wildfire-launcher.jar" – UbuMusic Dec 15 '19 at 07:26
  • It seems its bash script doesn't use relative path. I have change the command in step 4 using absolute path, it should works now. – Wan Chap Dec 15 '19 at 08:40
  • hmmmm.... well that sort of worked, but now there's a different problem that I don't understand. The launcher works, but it won't launch the program. In the launcher there's a message log tab that says "No JRE found in "/home//j-wildfire/j-wildfire-launcher.jar". I really don't know what this message means or how to solve it. – UbuMusic Dec 15 '19 at 09:25
  • Can you try to replace java to /usr/bin/java? – Wan Chap Dec 15 '19 at 10:09
  • How would I do that? – UbuMusic Dec 16 '19 at 06:30