Power off a Solaris system
Contributed by qmchenry 
Tagged: Solaris This command will safely turn off a Solaris system using the init command.
As superuser,
sync; sync; init 5
Using the init command instead of other options causes the system to use the runtime control scripts in /etc/rc0.d to stop system processes nicely and prevent data corruption.
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Anonymous said on August 11, 2009
I pressed Alt+F3 command prompt >> logged as admin >> given as poweroff command >> After next booting it is showing as >> Starting in powersave mode >> Its not able to boot the system >> Simply it reboots for 3 mins everytime >> The system is sun solaris and unix os