PTP - Picture Transfer Protocol
gphoto2
Web
http://www.gphoto.org/
Commands / Remote control
http://www.gphoto.org/doc/manual/using-gphoto2.html
http://www.gphoto.org/doc/remote/
Working with CHDK (Canon alternative firmware)
CHDK & PTP :
https://chdk.fandom.com/wiki/PTP_Extension
CHDK
LICKS Installer
http://www.zenoshrdlu.com/licks/licks.html
CHDKPTP for Linux
Installation :
https://app.assembla.com/spaces/chdkptp/wiki/Install