How to back up Android via Adb on Ubuntu
Go to the settings on your android device. Then enable the developer options, enable USB debugging. Then set a tic to enable the settings
Here you can find the commands to back up your data
First, install these packages to manage everything more elegant
sudo apt-get install android-tools-adb
Plugin your USB cable and accept the access
adb start-server
adb backup -apk -shared -all #or you can use also this command
adb backup -apk -shared -all -f mybackupfile.adb
To restore everything you can use this command
adb restore mybackupfile.adb
https://net2.com/how-to-backup-and-restore-your-android-device-with-adb-on-ubuntu/
Some additional further reading in German, maybe for future articles in German? ¯_(ツ)_/¯
https://www.droidwiki.org/wiki/Android_Debug_Bridge
Bonus: https://tutswiki.com/access-internet-on-linux-using-android-tethering/