Fastboot command lines for android

Fastboot_cmd.txt

1. Flashing the recovery image:
        fastboot flash recovery recovery.img

2. Flash the kernel and bootloader:
        fastboot flash boot boot.img


3. Erase a partition:
        fastboot erase cache


4. Reboot the phone:
        fastboot reboot


5. Boot with a custom built kernel and root filesystem (but not write them into the flash memory):
        fastboot boot linux-2.6/arch/arm/boot/zImage root-image/recovery.img-ramdisk.cpio.gz


6. Format partitions:
        fastboot format cache
        fastboot format userdata


7. Flash all partitions at once:
        fastboot -w flashall


8. Restoring from backed up images in the user’s computer::
        fastboot erase system
        fastboot erase data
        fastboot erase cache
   and then flash the images (starting with system):
        fastboot flash system system.img
        fastboot flash data data.img
        fastboot flash cache cache.img


9. Boot the phone with a specific linux kernel commandline argument:
        fastboot -c "console=ttyHSL0,115200,n8" boot boot.img

Hi Michael,
I have a Redmi Note 5 Pro, which is stuck on Fastboot. I am not able to boot into recovery, and the system partition is not available on the device, as I accidentally deleted it. Could you please help me if you have any idea about this?

Thanks,
Amey

Hi Michael,
I have a Redmi Note 5 Pro, which is stuck on Fastboot. I am not able to boot into recovery, and the system partition is not available on the device, as I accidentally deleted it. Could you please help me if you have any idea about this?

Thanks,
Amey

flash recovery and system images again.

How can I backup my userdata before flashing the new ROM? I have a crashlooping miui.systemui.plugin and it always goes into the recovery after a few UI crashes once it booted up. My Bootloader is locked with the USB debugging off.