How to use linux cmd shutdown the Android system?

[Danial]

I want to use api shutdown the Android system, but I can't.

When I use the api shutdown the Android system, it reboot,

I find there isn't shutdown cmd in kernel. I need this function,

what should I do?

[4guin4g4 · Accepted solution]

Try

halt now

it forces the system to shut down, but it does not save or takes care about anything.