// 刷system.img 方法
beideMacBook-Pro-2:core.cloud beifeng$ adb reboot bootloader
beideMacBook-Pro-2:core.cloud beifeng$ fastboot devices
beideMacBook-Pro-2:core.cloud beifeng$ fastboot flash system /Users/beifeng/Desktop/矩阵表/system.img
target reported max download size of 268435456 bytes
erasing 'system'...
OKAY [ 0.194s]
sending sparse 'system' 1/3 (259621 KB)...
OKAY [ 10.300s]
writing 'system' 1/3...
OKAY [ 5.017s]
sending sparse 'system' 2/3 (257053 KB)...
OKAY [ 9.949s]
writing 'system' 2/3...
OKAY [ 4.510s]
sending sparse 'system' 3/3 (210001 KB)...
OKAY [ 8.099s]
writing 'system' 3/3...
OKAY [ 4.035s]
finished. total time: 42.104s
beideMacBook-Pro-2:core.cloud beifeng$ fastboot reboot
rebooting...
finished. total time: 0.007s
beideMacBook-Pro-2:core.cloud beifeng$
