perform a full update of a target system
usage: fx update [-h|--help] Ask the target to update all packages that it has, then do an OTA. The target will use any update server available to it to do the update. This requires the target have a update server available to it. The 'serve' fx command is typically used to make your development host available to the target as an update server. Arguments: -h|--help Print out this message.