This will allow you to have a persistent root shell on the running Apertis system. It exploits the OverlayFS features to set a root and user password, and launch a backdoor root shell on port 4444.
https://github.com/ArcadeHustle/AtariVCSroot
https://github.com/ArcadeHustle/AtariVCSroot/blob/main/atarivcs.sh