The STM32CubeMX tool is written in portable java, but unfortunately it is distributed as a Windows executable embedded in a Windows installer.
To install it on Linux:
sudo java -jar SetupSTM32CubeMX-4.11.0.exe- install the tool somewhere in your home, eg:
/home/you/stm32/cubemx sudo chown -R you:you /home/you/stm32/cubemx
To run it:
java -jar /home/you/stm32/cubemx/STM32CubeMX.exe- or mark that file as executable, rename it to
STM32CubeMX.jar, and double click it

Note from future: finally CubeMX has a linux version of an installer, so launching an
.exefile via java is no longer needed: you can just performsudo ./SetupSTM32CubeMX-4.23.0.linux.