====== Automated Slideshow ======
===== Using feh =====
  sudo apt install feh
  feh -rzsZFD 5 /home/my_folder

===== Using a Shell Script and gthumb =====

[[https://superuser.com/questions/211561/loop-pictures-from-a-folder-and-display-fullscreen-slideshow|Linux command for slideshow]]

So here is what you do:

  * Make a directory with only your pictures in them.
  * open a terminal window and change to the directory made in the previous step.
  * Run this command, substituting 5 with however many seconds you want to wait in between updates.

  while true ; do for i in * ; do cp "$i" ~/slideshow.jpg ; echo $i ; sleep 5 ; done ; done

  * Open gthumb and view the image in your home directory called slideshow.jpg, it should rotate the picture. You can make gthumb full screen now if you need to.
  * Try adding and removing pictures from the picture directory. It won't actually update until its finished going through the whole directory each time, but it will update. The echo $i is in there just so you can see what picture it just copied into place each time.
  * When you are ready to stop the slideshow, you can press Ctrl-C in the terminal window.

====== Setting up rsync ======
  * [[https://www.digitalocean.com/community/tutorials/how-to-use-rsync-to-sync-local-and-remote-directories|How to Use Rsync to Synchronize Two Folders]]