To run Loom normally:
java -jar loom.jar
To start Loom with a file
java -jar loom.jar -f="file/path"
To automatically run that file on load
java -jar loom.jar -f="file/path" -r
To run Loom in headless mode (automatic in a headless environment)
java -jar loom.jar -f="file/path" -r -h