1. Terminal( 终端）： killall Terminal 退出终端
2. shuttingDown :
sudo shutdown -h now
3.Rebooting:
sudo shutdown -r now
4. Sleeping:
sudo shutdown -s now
5. Using a Timed Shutdon;
sudo shutdown -r 1301011530
6. Using a Timed shutdown
restart at 3:30pm on January 1, 2013 _> sudo shutdown -r 1301011530
after a set number of minues _> sudo shutdown -h +30
参考： http://www.maclife.com/article/columns/terminal_101_properly_shutting_down_your_mac
http://www.maclife.com/article/howtos/25_top_os_x_terminal_tips