问题如下:
$ adb root
adbd is already running as root
$
$
$ adb remount
remount of /system failed: Read-only file system
remount failed
问题解决:
$ adb disable-verity
Verity disabled on /system
Now reboot your device for settings to take effect
$
$ adb reboot
$
$
$ adb root
adbd is already running as root
$
$
$ adb remount
remount succeeded