ubuntu 待机休眠



默认命令行待机命令：pm-suspend
休眠：pm-hibernate

详见：man pm-suspend
man pm-hibernate

      pm-suspend
           During suspend most devices are shutdown, and system state is
           saved in RAM. The system still requires power in this state.
           Most modern systems require 3 to 5 seconds to enter and leave
           suspend, and most laptops can stay in suspend mode for 1 to 3
           days before exhausting their battery.

       pm-hibernate
           During hibernate the system is fully powered off, and system
           state is saved to disk. The system does not require power, and
           can stay in hibernate mode indefinitely. Most modern systems
           require 15 to 45 seconds to enter and leave hibernate, and
           entering and leaving hibernate takes longer when you have more
           memory.

       pm-suspend-hybrid
           Hybrid-suspend is the process where the system does everything
           it needs to hibernate, but suspends instead of shutting down.
           This means that your computer can wake up quicker than for
           normal hibernation if you do not run out of power, and you can
           resume even if you run out of power. s2both(8) is an
           hybrid-suspend implementation.