关机
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::

	shutdown -h now  # 关闭系统(1)
	init 0  # 关闭系统(2)
	telinit 0  # 关闭系统(3)
	shutdown -h hours:minutes &  # 按预定时间关闭系统
	shutdown -c  # 取消按预定时间关闭系统
	shutdown -r now  # 重启(1)
	reboot  # 重启(2)
	logout  # 注销