reset_android_gatekeeper_password/clean_lock_passwd.sh

#!/bin/bash

adb root
adb remount

# Remove old passwords
adb shell rm /data/system/gatekeeper.password.key
adb shell touch /data/system/gatekeeper.password.key
adb shell rm /data/system/gatekeeper.pattern.key
adb shell touch /data/system/gatekeeper.password.key

# Copy virgin version of locksettings DB
adb push locksettings.db-shm /data/system/
adb push locksettings.db-wal /data/system/

adb reboot