@ michele-p,
ti posto il risultato perchè non so che fare

:
[christopher@localhost ~]$ gphoto2
Usage: gphoto2 [-?] [-?] [-?va] [-?va] [-?va] [-?va] [-?valLnPTDR] [-?|--help] [--usage] [--debug]
[--debug-logfile=FILENAME] [--quiet] [--hook-script=FILENAME]
[--stdout] [--stdout-size] [--auto-detect] [--show-exif=STRING]
[--show-info=STRING] [--summary] [--manual] [--about] [--shell]
[-v|--version] [--list-cameras] [--list-ports] [-a|--abilities]
[--port=FILENAME] [--speed=SPEED] [--camera=MODEL] [--usbid=USBIDs]
[--list-config] [--get-config=STRING] [--set-config=STRING]
[--wait-event] [--capture-preview] [-F|--frames COUNT]
[-I|--interval SECONDS] [--capture-image] [--capture-movie]
[--capture-sound] [-l|--list-folders] [-L|--list-files]
[-m|--mkdir DIRNAME] [-r|--rmdir DIRNAME] [-n|--num-files]
[-p|--get-file RANGE] [-P|--get-all-files] [-t|--get-thumbnail RANGE]
[-T|--get-all-thumbnails] [--get-metadata=RANGE] [--get-all-metadata]
[--upload-metadata=STRING] [--get-raw-data=RANGE]
[--get-all-raw-data] [--get-audio-data=RANGE] [--get-all-audio-data]
[-d|--delete-file RANGE] [-D|--delete-all-files]
[-u|--upload-file nomefile] [--filename=FILENAME_PATTERN]
[-f|--folder FOLDER] [-R|--recurse] [--no-recurse] [--new]
[--force-overwrite]
[christopher@localhost ~]$
GRAZIE
