Authorize ADB for a non-booting device

authorize_adb.sh

#!/usr/bin/env bash

adb shell 'echo "persist.service.adb.enable=1" >> default.prop'
adb shell 'echo "persist.service.debuggable=1" >> default.prop'
adb shell 'echo "persist.sys.usb.config=mtp,adb" >> default.prop'
adb shell 'echo "persist.service.adb.enable=1" >> /system/build.prop'
adb shell 'echo "persist.service.debuggable=1" >> /system/build.prop'
adb shell 'echo "persist.sys.usb.config=mtp,adb" >> /system/build.prop'
adb push ~/.android/adbkey.pub /data/misc/adb/adb_keys

1. Reboot to TWRP
2. Mount /system
3. Execute this script

How to execute this through twrp on a phone with broken screen? Do I have to create a flashable zip or is there an adb command through twrp to execute shell scripts?

@malitech You will need to mount /system through adb shell, but this script executed in your computer.

@ontherunvaro Great stuff dude, thanks!