The following command line switches can be passed to a bootstrapped Factor image:

-help	Show help for the command line switches.
-e=code	This specifies a code snippet to evaluate and then exit Factor.
-run=vocab	vocab is the name of a vocabulary with a MAIN: hook to run on startup, for example listener or ui.tools.
-no-user-init	Inhibits the running of user initialization files on startup. See Running code on startup.
-roots=paths	Specify additional vocabulary roots. The list is colon-separated on Unix and semicolon-separated on Windows.