启用/关闭 硬件设备（硬盘，红外，网卡，无线网卡等）
ubuntu下关闭swap
sudo swapoff /dev/hdax
启用/关闭 网卡
usage: /etc/init.d/networking {stop|start|restart} 重启网卡
/etc/init.d/networking restart
启用/关闭 无线网卡
sudo iwconfig wlan0 power on sudo iwconfig wlan0 power off
检查电池信息
/proc/acpi/battery/
比如info文件内容
present:yes
designcapacity:4400mAh
lastfullcapacity:4191mAh
batterytechnology:rechargeable
designvoltage:10800mV
designcapacitywarning:205mAh
designcapacitylow:143mAh
capacitygranularity1:62mAh
capacitygranularity2:3986mAh
modelnumber:Primary
serialnumber:
batterytype:LION
OEMinfHewlett-Packard
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