Fastboot is a protocol used to update the flash filesystem in Android devices from a host via USB. It is part of the Android Debug Bridge library (adb). The materialization of this protocol is the fastboot command, which we can make use of, to easily interface with the protocol. Since it is part of the adb library, before using it, we need to install the Android SDK and configure our environment to work from the command line. This post, will guide you through this process.