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FASTBOOTFlashingCaution

fastboot flash boot <boot.img>

Flash kernel / ramdisk to boot partition

Caution RequiredFlashing an incompatible kernel will prevent the OS from booting, causing a bootloop.
What It Does

Writes a kernel boot image to the boot partition. Commonly used for rooting with Magisk or installing custom kernels.

Command Syntax
Terminal
$fastboot flash boot <boot.img>
Usage Examples
$fastboot flash boot boot.img
$fastboot flash boot magisk_patched.img
OFFICIAL COMPANION GUIDE

Flashing Generic System Images (GSI) / Project Treble?

Learn how to enter fastbootd, erase and resize logical dynamic partitions, and disable dm-verity with the complete handbook by @mkr-infinity:

Open GSI Flashing Guide
Prerequisites & Requirements
  • Unlocked bootloader
Related Commands
fastboot boot <boot_image.img>

Temporarily boot kernel image into RAM

fastboot flash init_boot <init_boot.img>

Flash init_boot partition (Android 13+)

fastboot flash vbmeta --disable-verity --disable-verification vbmeta.img

Flash vbmeta and disable AVB verification

Found an error or missing flag for fastboot flash boot <boot.img>?

Submit a correction or request additional examples on GitHub.

Report ErrorSuggest Example
Having issue? Contact @mkr_infinity

Direct technical assistance & ROM flashing troubleshooting by Mohammad Kaif Raja.

Contact @mkr_infinity