Yes, you are correct, there is no ‘installer’ as such for the Linux version, only for the Windows and Mac versions, and then only because those users are used to having installers.
Vassal can be run from the command line on all platforms.
In fact, the ‘other’ package you can download is the ‘base’ package that should ‘theoretically’ run from the command line on every single platform.
The platform specific packages have been tweaked with installers and/or specific versions of Java or packaged libraries that will run on a wider range of machines using those platforms.
its very easy to create a Launcher from your desktop for vassal.
You should be able to “right click” on your desktop and the option to create a Launcher should be in the menu
Select the vassal.sh as executable , your vassal directory as working directory
I apologize to you. I misread the topic very wrong so I found this link on the net and shared it. I thought that topic starter has a problem to installing the vassal on Linux version.