When running Matlab, on linux at least, I see the process MATLABWebUI, I also see this when running in batch mode (i.e. launched matlab with -batch command lin switch). Usually I am using Simulink in case it is relevant. What is this process and what is it for? Is it required in batch mode?

Answer:

• ‘MATLABWebUI’ is the process that handles the communication between the MATLAB desktop and the web-based UI (user interface) of MATLAB.
• The reason you see it on Linux when you launch MATLAB from the command line is that the MATLAB desktop environment may not be launched when running in batch mode on Linux.
• When you launch MATLAB in batch mode, it does not load the ‘MATLABDesktop’ process that handles the visual display of the MATLAB desktop UI. Instead, it relies on the ‘MATLABWebUI’ process to handle the communication between MATLAB and any web-based UI components, such as app designer or Simulink.