Due to a bug in the installer for Linux you may get a NullPointerException error when trying to launch the webNetwork installer. This can happen in gui mode or console mode.
The workaround is to take the .bin install file and put it 2 levels deep and then launch it.
For example, if you transfer the .bin install file to /tmp make a folder like temp1 then inside temp1 make temp2. Move the .bin to /tmp/temp1/temp2 and then launch it. It should work.