How to configure a variable via uvm_config_db from command line?

I am trying to configure a variable registered in factory with uvm_config_db. I can do it from the test or environment. I want to do the same from command line but I could not find the links which explain the same.

Can anyone point to me links ?

In reply to Varunshivashankar:
https://verificationacademy.com/verification-methodology-reference/uvm/docs_1.1d/html/files/base/uvm_cmdline_processor-svh.html