详细信息关于ADB shell启动、停止和重启

**Introduction **

adb is the sdk tool to manage the state of emulator or powerd device.

start & stop belong to the programs located in /system/bin (system.img). They can be accessed via 'adb shell a command'.

Reboot is one of the parameters provided by ADB, which can be executed directly via the 'ADB Reboot' command.

the officially description for start, stop, reboot is

• Commence/Initiate (Resumes) an emulator or device instance.
  Terminate execution of an emulator or device instance.
  Resumes operation of devices.

**What's the difference between them ? **

Let's start from checking t