# Command Line Reference¶

The gaffer command is an application loader used to run any of the applications shipped with gaffer, or any extension apps installed in directories specified by the GAFFER_APP_PATHS environment variable.

A gaffer command takes this general form :

gaffer appName -arg value -arg value ...


If the appName is not specified it defaults to gui, and the familiar main interface is loaded. This shortcut also allows a file to load to be specified :

gaffer file.gfr


Help for any application can be printed with the following command :

gaffer -help appName


Further information on the specific command line arguments for each application is provided below.