Hi Jenny,
If you can do the following from the terminal command line (which can be opened using ctrl-alt-t):
$>java -version
Your should see something like this (Java versions may vary (and note, I'm running OpenJDK not Oracle)):
openjdk version "1.8.0_131"
OpenJDK Runtime Environment (build 1.8.0_131-8u131-b11-2ubuntu1.17.04.3-b11)
OpenJDK 64-Bit Server VM (build 25.131-b11, mixed mode)
This will tell you Java is installed in a way that can be used. If you don't see this then you'll need to do that first from the Oracle website. Google: Oracle Java JDK. There'll be separate instructions.
Once you've established Java is okay. If your droid folder within Downloads looks like this:
drwxr-xr-x 3 username username 4096 Aug 20 15:48 .
drwxr-xr-x 4 username username 4096 Aug 27 22:56 ..
-rw-r--r-- 1 username username 2879 Aug 1 15:44 ChangeLog
-rw-r--r-- 1 username username 5606 Aug 1 15:57 droid.bat
-rw-r--r-- 1 username username 139114 Aug 1 15:55 droid-command-line-6.4.jar
-rw-r--r-- 1 username username 5103 Aug 1 15:57 droid.sh
-rw-r--r-- 1 username username 672865 Aug 1 15:56 droid-ui-6.4.jar
drwxrwxrwx 2 username username 20480 Aug 1 15:57 lib
-rw-r--r-- 1 username username 1549 Aug 1 15:44 LICENSE
-rw-r--r-- 1 username username 3075 Aug 1 15:57 Running DROID.txt
Which can be found by doing the following:
$>ls -la
Then you can just run the following (replacing the x with the correct version):
$>java -jar droid-ui-6.x.jar
And it should run. This should be enough.
For the .sh to work then you might need to add execution permissions from the droid folder:
$>chmod +x droid.sh
And then you can run it using:
$>./droid.sh
And then it will run within the default parameters established by TNA.
I hope that helps.
Ross