The answer, I assume, is: ./vsim &
Running vsim with no options from the command line will invoke the Questa SIM GUI. Running Questa from the command line for batch requires options and a compiled design. That's more than can be explained here but the Questa SIM User's Manual is the best place to start.
I cannot get vsim to start because LM_LICENSE_FILE has not been set.
Is there documentation on how to init the Linux environment variables for flexlm?
Is there a script for doing this?