Its a UNIX system...
On the left is the victim Google Pixel 5b phone and on the right is the PinePhone attacker. The PinePhone hosts an rshell.sh reverse shell script via a python web server on port 8000 and has a netcat listener setup on port 1234. The pixel downloads the rshell.sh file via curl and executes it sending a bash reverse shell to the PinePhone.
https://bluesquare23.sh
https://www.pine64.org/pinephone/