fastboot
Communicate with connected Android devices when in bootloader mode (the one place ADB doesn't work). tldr-pages
On several platforms
Several platforms
Unlock the bootloader
fastboot oem unlockIdentifyRelock the bootloader
fastboot oem lockIdentifyReboot the device from fastboot mode into fastboot mode again
fastboot reboot bootloaderIdentifyFlash a given image
fastboot flash path/to/file.imgIdentifyFlash a custom recovery image
fastboot flash recovery path/to/file.imgIdentifyList connected devices
fastboot devicesIdentifyDisplay all information of a device
fastboot getvar allIdentify