[Google Pixel XL Questions & Answers] quangtran1:
This copy and paste is lousy since it screws up spacing, so I attached the syntax list here.

View attachment 3991598

commands:

update <filename> Reflash device from update.zip.

Sets the flashed slot as active.

flashall Flash boot, system, vendor, and --

if found -- recovery. If the device

supports slots, the slot that has

been flashed to is set as active.

Secondary images may be flashed to

an inactive slot.

flash <partition> [ <filename> ] Write a file to a flash partition.

flashing lock Locks the device. Prevents flashing.

flashing unlock Unlocks the device. Allows flashing

any partition except

bootloader-related partitions.

flashing lock_critical Prevents flashing bootloader-related

partitions.

flashing unlock_critical Enables flashing bootloader-related

partitions.

flashing get_unlock_ability Queries bootloader to see if the

device is unlocked.

flashing get_unlock_bootloader_nonce Queries the bootloader to get the

unlock nonce.

flashing unlock_bootloader <request> Issue unlock bootloader using request

.

flashing lock_bootloader Locks the bootloader to prevent

bootloader version rollback.

erase <partition> Erase a flash partition.

format[:[<fs type>][:[<size>]] <partition>

Format a flash partition. Can

override the fs type and/or size

the bootloader reports.

getvar <variable> Display a bootloader variable.

set_active <slot> Sets the active slot. If slots are

not supported, this does nothing.

boot <kernel> [ <ramdisk> [ <second> ] ] Download and boot kernel.

flash:raw boot <kernel> [ <ramdisk> [ <second> ] ]

Create bootimage and flash it.

devices [-l] List all connected devices [with

device paths].

continue Continue with autoboot.

reboot [bootloader] Reboot device [into bootloader].

reboot-bootloader Reboot device into bootloader.

help Show this help message.

options:

-w Erase userdata and cache (and format

if supported by partition type).

-u Do not erase partition before

formatting.

-s <specific device> Specify a device. For USB, provide ei

ther

a serial number or path to device por

t.

For ethernet, provide an address in t

he

form <protocol>:<hostname>[:port] whe

re

<protocol> is either tcp or udp.

-p <product> Specify product name.

-c <cmdline> Override kernel commandline.

-i <vendor id> Specify a custom USB vendor id.

-b, --base <base_addr> 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 Specify a custom tags offset.

(default: 0x00000100)

-n, --page-size <page size> Specify the nand page size

(default: 2048).

-S <size>[K|M|G] Automatically sparse files greater

than 'size'. 0 to disable.

--slot <slot> Specify slot name to be used if the

device supports slots. All operations

on partitions that support slots will

be done on the slot specified.

'all' can be given to refer to all sl

ots.

'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[=<slot>] Sets the active slot. If no slot is

provided, this will default to the va

lue

given by --slot. If slots are not

supported, this sets the current slot

to be active. This will run after all

non-reboot commands.

--skip-secondary Will not flash secondary slots when

performing a flashall or update. This

will preserve data on other slots.

--unbuffered Do not buffer input or output.

--version Display version.

-h, --help show this message.