$ deluge
usage: deluge [-h] [-V] [-c <config>] [-l <logfile>] [-L <level>]
[--logrotate [<max-size>]] [-q] [--profile [<profile-file>]]
[-s {console,web}]
{console,web} [UI args] ...
deluge: error: argument {console,web} [UI args]: invalid choice: 'gtk' (choose from 'console', 'web')