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As I know by now, shutdown call init to change runlevel to stop the system running and shutdown will give some time for the system to do some other cleaning work. I am not sure whether I am right. What I wanna know is if I set TIME to now Whether shutdown works same as init 0. It is same question with init 6 and shutdown -r now. Thanks comes first!
This does not answer the question. – Jan Doggen – 2014-09-24T06:29:12.757
@ankit-yadav-trk it's wrong, it does not hibernate the system, but it shutdown it invoking the init 0 (plus other "social" tasks). – tmow – 2018-05-04T09:06:44.443