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.TH "FASTBOOT" "1" "7.0.0_r1" "android\-platform\-system\-core" "fastboot Manuals"
.hy
.SH NAME
.PP
fastboot \- Android flashing and booting utility
.SH SYNOPSIS
.PP
\f[B]fastboot\f[] [\-w] [\-u] [\-s \f[I]device\f[]] [\-p
\f[I]product\f[]] [\-c \f[I]cmdline\f[]] [\-i \f[I]vendorId\f[]] [\-b
\f[I]baseAddr\f[]] [\-n \f[I]pageSize\f[]] [\-S \f[I]size\f[][K|M|G]]
\f[I]command\f[]
.SH DESCRIPTION
.PP
\f[B]fastboot\f[] is a command line tool for flashing an Android device,
boot an Android device to fastboot mode, etc..
.SH OPTIONS
.TP
.B \-w
Erase userdata and cache (and format if supported by partition type).
.RS
.RE
.TP
.B \-u
Do not erase partition before formatting.
.RS
.RE
.TP
.B \-s \f[I]device\f[]
Specify device serial number or path to device port.
.RS
.RE
.TP
.B \-l
With \f[B]devices\f[] command, list device paths."
.RS
.RE
.TP
.B \-p \f[I]product\f[]
Specify product name.
.RS
.RE
.TP
.B \-c \f[I]cmdline\f[]
Override kernel commandline.
.RS
.RE
.TP
.B \-i \f[I]vendorId\f[]
Specify a custom USB vendor ID.
.RS
.RE
.TP
.B \-b|\-\-base \f[I]baseAddr\f[]
Specify a custom kernel base address (default: \f[B]0x10000000\f[]).
.RS
.RE
.TP
.B \-\-kernel\-offset
Specify a custom kernel offset (default: \f[B]0x00008000\f[]).
.RS
.RE
.TP
.B \-\-ramdisk\-offset
Specify a custom ramdisk offset (default: \f[B]0x01000000\f[]).
.RS
.RE
.TP
.B \-\-tags\-offset \f[I]offset\f[]
Specify a custom tags offset (default: \f[B]0x00000100\f[]).
.RS
.RE
.TP
.B \-n|\-\-page\-size \f[I]pageSize\f[]
Specify the nand page size (default: \f[B]2048\f[]).
.RS
.RE
.TP
.B \-S \f[I]size\f[][K|M|G]
Automatically sparse files greater than \[aq]size\[aq].
\f[B]0\f[] to disable.
.RS
.RE
.TP
.B \-\-slot \f[I]suffix\f[]
Specify slot suffix to be used if the device supports slots.
This will be added to all partition names that use slots.
\f[B]all\f[] can be given to refer to all slots.
\f[B]other\f[] 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.
.RS
.RE
.TP
.B \-a, \-\-set\-active[=]
Sets the active slot.
If no suffix is provided, this will default to the value given by
\f[B]\-\-slot\f[].
If slots are not supported, this does nothing.
This will run after all non\-reboot commands.
.RS
.RE
.TP
.B \-\-wipe\-and\-use\-fbe
On devices which support it, erase userdata and cache, and enable
file\-based encryption.
.RS
.RE
.TP
.B \-\-unbuffered
Do not buffer input or output.
.RS
.RE
.TP
.B \-\-version
Display version.
.RS
.RE
.TP
.B \-h|\-\-help
show this message.
.RS
.RE
.SH COMMANDS
.TP
.B fastboot update \f[I]filename\f[]
Reflash device from update.zip.
.RS
.RE
.TP
.B fastboot flashall
Flash boot, system, vendor, and (if found) recovery.
.RS
.RE
.TP
.B fastboot flash \f[I]partition\f[] [\f[I]filename\f[]]
Write a file to a flash partition.
.RS
.RE
.TP
.B fastboot flashing lock
Locks the device.
Prevents flashing.
.RS
.RE
.TP
.B fastboot flashing unlock
Unlocks the device.
Allows flashing any partition except bootloader\-related partitions.
.RS
.RE
.TP
.B fastboot flashing lock_critical
Prevents flashing bootloader\-related partitions.
.RS
.RE
.TP
.B fastboot flashing unlock_critical
Enables flashing bootloader\-related partitions.
.RS
.RE
.TP
.B fastboot flashing get_unlock_ability
Queries bootloader to see if the device is unlocked.
.RS
.RE
.TP
.B fastboot erase \f[I]partition\f[]
Erase a flash partition.
.RS
.RE
.TP
.B fastboot format[:[\f[I]fs type\f[]][:[\f[I]size\f[]]] \f[I]partition\f[]
Format a flash partition.
Can override the fs type and/or size the bootloader reports.
.RS
.RE
.TP
.B fastboot getvar \f[I]variable\f[]
Display a bootloader variable.
.RS
.RE
.TP
.B fastboot set_active \f[I]suffix\f[]
Sets the active slot.
If slots are not supported, this does nothing.
.RS
.RE
.TP
.B fastboot boot \f[I]kernel\f[] [\f[I]ramdisk\f[] [\f[I]second\f[]]]
Download and boot kernel.
.RS
.RE
.TP
.B fastboot flash:raw boot \f[I]kernel\f[] [\f[I]ramdisk\f[] [\f[I]second\f[]]]
Create bootimage and flash it.
.RS
.RE
.TP
.B fastboot devices [\-l]
List all connected devices (with device paths if \f[B]\-l\f[] is used).
.RS
.RE
.TP
.B fastboot continue
Continue with autoboot.
.RS
.RE
.TP
.B fastboot reboot [bootloader]
Reboot device [into bootloader].
.RS
.RE
.TP
.B fastboot reboot\-bootloader
Reboot device into bootloader.
.RS
.RE
.TP
.B fastboot help
Show this help message.
.RS
.RE
.SH AUTHORS
The Android Open Source Project.