Say I want to email my Pi a picture, and have it set the latter as it's desktop background. Say that I also already have the script that makes it pull the mail from GMAIL and launch a python script. The missing piece is the actual changing of the background.

  • What graphical environment does your PI run? Stock LXDE? – user29510 Jun 21 '15 at 11:05
  • There's also some example code valid for Gnome on Stack Overflow, as a base. – user29510 Jun 21 '15 at 11:21
  • I installed raspbian and did no serious modifications – Andrea Jun 21 '15 at 12:05
pcmanfm --set-wallpaper /point-to-new-wallpaper

There's a catch though. With LXDE, setting the desktop wallpaper from the command line has been on the TODO list for at least 5 years. You'll have to check whether it works or not.

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