fastboot
fastboot
TLDR
Unlock the bootloader
$ fastboot oem unlock
Relock the bootloader
$ fastboot oem lock
Reboot the device from fastboot mode into fastboot mode again
$ fastboot reboot bootloader
Flash a given image
$ fastboot flash [file.zip]
Flash a custom recovery image
$ fastboot flash recovery [file.img]
Display connected devices
$ fastboot devices
Display all information of a device
$ fastboot getvar all