Find the *.oga files here
/usr/share/sounds/Yaru/stereo/

Technical notes, and other ideas.
Find the *.oga files here
/usr/share/sounds/Yaru/stereo/
When using menu libre you want it to pickup the new application settings, right away.
#!/bin/bash
# Show a notification that the app is launching
notify-send "Refreshing ~/.local/share/applications/"
update-desktop-database ~/.local/share/applications/
GUI Text Search Tool
sudo apt install searchmonkey
If the application icon is missing, try the following:
sudo nano /usr/share/applications/searchmonkey.desktop
Use the following image, verify it exists.
/usr/share/icons/hicolor/48x48/apps/searchmonkey.png
You can use the following link to find older versions of applications:
http://www.oldapps.com/itunes.php
To reset your iPod:
1. Toggle the Hold switch on and off. (Slide it to Hold, then turn it off again.)
2. Press and hold the Menu and Center (Select) buttons simultaneously until the Apple logo appears, about 6 to 10 seconds. You may need to repeat this step.
Tip:
If you are having difficulty resetting your iPod, set it on a flat surface. Make sure the finger pressing the Select button is not touching any part of the click wheel. Also make sure that you are pressing the Menu button toward the outside of the click wheel, and not near the center.
If the above steps did not work, try connecting iPod to a power adapter and plug the power adapter into an electrical outlet, or connect iPod to your computer. Make sure the computer is turned on and isn't set to go to sleep.