7.2. 关机

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