How to stop android phone from vibrate during the start up and the shut down? When one turn on the phone or switch off the phone, the android phone will make a single vibration. 

I don't know whether if the phone is telling me that - Good Morning or Good Bye by using vibration, but what I would like to know if it is possible to set it to stop vibrate when I either switch on or switch off the phone?

Using Froyo Android. Thanks.
Unfortunately this isn't something that can't be turned on or off.  It's possible that it's a vendor specific thing, you don't say what device you have or if you are rooted or not, so I assume this is the case.

I'm running a SGS3 with a custom ROM on it (AOKP) and I've just restarted the device and can confirm there was no vibration during the start or stop procedure.  However my Nexus One with a stock ROM did vibrate.

A possible fix is to root the device and stick a custom ROM on there, but that's quite an extreme fix for the issue.