Command Line Virtuoso
From Vlsiwiki
You can run Cadence virtuoso in command line only mode. To do this, you run:
virtuoso -nograph
and you will get a prompt:
Done loading FreePDK customizations. >
Here, you can run SKILL scripts.
These skill scripts can create cell views, place instances, create shapes, etc. You can run any of the SKILL commands that you see in the CIW during GUI mode cadence.
To quit, type "exit".