This is a simple bash shell script used to recover the linux grub after dual boot of the system. After installing windows or other OS in your system your grub will be hidden after new install then you need to recover the grub using live boot with network access. After runnig live boot with Kali Linux or Ubuntu OS go to this link
https://github.com/3tternp/grub-recovery-tool/
clone the link to your Desktop as
git clone https://github.com/3tternp/grub-recovery-tool/
it will automatically detect your OS and run the grub recovery command automatically after completion of the recovery process you have to remove your bootable device and reboot your system
There you get your grubloader
Successfully Tested on Kali Linux (2023.2) and Ubunu (23.04 LTS)