Alpine Linux perfectly works on FW 5.17+.
1. Jailbreak the Kindle, install KUAL.
2. Install the
HF version of kterm
3. Read the
install instructions and warnings!
3. Download Alpine for Kindle from the
Releases page
4. Run alpine.sh from kterm, then startgui.sh.
5. Enjoy!
Optional: Create your own alpine image using the create-release.sh script, as described in the documentation. (this is recommended if you want to install packages, as apk is not working on the provided image.)
These methods are tested and safe.