---
name: "fastboot"
section: "1"
platform: "linux"
package: "fastboot"
version: "1:34.0.5-12"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/fastboot"
---

# fastboot(1)

Android flashing and booting utility

## NAME

fastboot - Android flashing and booting utility

## SYNOPSIS

**fastboot** \[-w\] \[-u\] \[-s *device*\] \[-p *product*\] \[-c *cmdline*\] \[-i *vendorId*\] \[-b *baseAddr*\] \[-n *pageSize*\] \[-S *size*\[K\|M\|G\]\] *command*

## DESCRIPTION

WARNING: This manual might be outdated, please refer to the official documentation.

**fastboot** is a command line tool for flashing an Android device, boot an Android device to fastboot mode, etc..

## OPTIONS

- \-w

  Erase userdata and cache (and format if supported by partition type).

- \-u

  Do not erase partition before formatting.

- \-s *device*

  Specify device serial number or path to device port.

- \-l

  With **devices** command, list device paths.

- \-p *product*

  Specify product name.

- \-c *cmdline*

  Override kernel commandline.

- \-i *vendorId*

  Specify a custom USB vendor ID.

- \-b\|--base *baseAddr*

  Specify a custom kernel base address (default: **0x10000000**).

- \--kernel-offset

  Specify a custom kernel offset (default: **0x00008000**).

- \--ramdisk-offset

  Specify a custom ramdisk offset (default: **0x01000000**).

- \--tags-offset *offset*

  Specify a custom tags offset (default: **0x00000100**).

- \-n\|--page-size *pageSize*

  Specify the nand page size (default: **2048**).

- \-S *size*\[K\|M\|G\]

  Automatically sparse files greater than 'size'. **0** to disable.

- \--slot *suffix*

  Specify slot suffix to be used if the device supports slots. This will be added to all partition names that use slots. **all** can be given to refer to all slots. **other** can be given to refer to a non-current slot. If this flag is not used, slotted partitions will default to the current active slot.

- \-a, --set-active\[=\]

  Sets the active slot. If no suffix is provided, this will default to the value given by **--slot**. If slots are not supported, this does nothing. This will run after all non-reboot commands.

- \--wipe-and-use-fbe

  On devices which support it, erase userdata and cache, and enable file-based encryption.

- \--unbuffered

  Do not buffer input or output.

- \--version

  Display version.

- \-h\|--help

  show this message.

## COMMANDS

- fastboot update *filename*

  Reflash device from update.zip.

- fastboot flashall

  Flash boot, system, vendor, and (if found) recovery.

- fastboot flash *partition* \[*filename*\]

  Write a file to a flash partition.

- fastboot flashing lock

  Locks the device. Prevents flashing.

- fastboot flashing unlock

  Unlocks the device. Allows flashing any partition except bootloader-related partitions.

- fastboot flashing lock\_critical

  Prevents flashing bootloader-related partitions.

- fastboot flashing unlock\_critical

  Enables flashing bootloader-related partitions.

- fastboot flashing get\_unlock\_ability

  Queries bootloader to see if the device is unlocked.

- fastboot erase *partition*

  Erase a flash partition.

- fastboot format\[:\[*fs type*\]\[:\[*size*\]\] *partition*

  Format a flash partition. Can override the fs type and/or size the bootloader reports.

- fastboot getvar *variable*

  Display a bootloader variable.

- fastboot set\_active *suffix*

  Sets the active slot. If slots are not supported, this does nothing.

- fastboot boot *kernel* \[*ramdisk* \[*second*\]\]

  Download and boot kernel.

- fastboot flash:raw boot *kernel* \[*ramdisk* \[*second*\]\]

  Create bootimage and flash it.

- fastboot devices \[-l\]

  List all connected devices (with device paths if **-l** is used).

- fastboot continue

  Continue with autoboot.

- fastboot reboot \[bootloader\]

  Reboot device \[into bootloader\].

- fastboot reboot-bootloader

  Reboot device into bootloader.

- fastboot help

  Show this help message.

## AUTHORS

The Android Open Source Project.