The juke command can be invoked in two ways, the first starts an interactive session, the second specifies an individual command to be executed, and an interactive session is not started. The juke command uses a very simple rule; if its first argument does not begin with a "/" or "-" character, it assumes that its command line arguments constitute a command, as described in the following section.
If the first argument does start with a "/" or "-" character, or there are no arguments to the juke command, the program begins an interactive session and uses the arguments on the command line as the arguments to an initial set command, described below.