Linux CPU温度，风扇监测lm-sensors

平台：Debian 4.7.2

一、安装lm-sensors

		CentOS: yum install *sensors*
		Ubuntu: apt-get install lm_sensors
		deb包安装: https://packages.debian.org/jessie/lm-sensors

二、sensors-detect命令探测

		输入命令，一路Yes或者Enter即可

三、执行sensors得到输出

		root@Debian:~# sensors 
		
		i350bb-pci-0400
		Adapter: PCI adapter
		loc1:         +38.0 C  (high = +120.0 C, crit = +110.0 C)
		
		coretemp-isa-0000
		Adapter: ISA adapter
		Physical id 0:  +26.0 C  (high = +84.0 C, crit = +100.0 C)
		Core 0:         +22.0 C  (high = +84.0 C, crit = +100.0 C)
		Core 1:         +23.0 C  (high = +84.0 C, crit = +100.0 C)
		Core 2:         +24.0 C  (high = +84.0 C, crit = +100.0 C)
		Core 3:         +23.0 C  (high = +84.0 C, crit = +100.0 C)

		此时发现仅输出了温度信息，温度信息是记录在/sys/devices/platform/coretemp.N目录下tempN_input中
		root@Debian:~# cat /sys/devices/platform/coretemp.0/temp1_input 
		27000
		
		由内核模块coretemp提供
		root@Debian:~# lsmod | grep coretemp
		coretemp               12854  0 

四、补充相应内核模块

		如果要输出风扇信息，首先需要有nct6775之类的设备，其次需要insmod nct6775.ko。nct6775.ko是与风扇相关的
		驱动模块。这里贴一个源码地址：https://github.com/killghost/nct6775
		
		拿到源码后按内核头文件存放位置及自身需求更改Makefile文件，执行make生成nct6775.ko文件。这里有一点需要注
		意：linux4.x后判断版本会使用kstrtoul函数，在我贴出的源码的compat.h中存在这几行代码，注释掉即可编译通过。
		#ifndef kstrtol
		#define kstrtol strict_strtol
		#endif
		#ifndef kstrtoul
		#define kstrtoul strict_strtoul
		#endif

		编译好nct6775.ko后挂载模块，再执行sensors查看，就得到了想要的CPU温度及有关风扇的信息：
		root@Debian:~# insmod nct6775.ko 
		root@Debian:~# sensors 
		nct6776-isa-0a10
		Adapter: ISA adapter
		in0:            +1.13 V  (min =  +0.00 V, max =  +1.74 V)
		in1:            +1.02 V  (min =  +0.00 V, max =  +0.00 V)  ALARM
		in2:            +3.36 V  (min =  +0.00 V, max =  +0.00 V)  ALARM
		in3:            +3.36 V  (min =  +0.00 V, max =  +0.00 V)  ALARM
		in4:            +1.02 V  (min =  +0.00 V, max =  +0.00 V)  ALARM
		in5:            +1.21 V  (min =  +0.00 V, max =  +0.00 V)  ALARM
		in6:            +1.02 V  (min =  +0.00 V, max =  +0.00 V)  ALARM
		in7:            +3.33 V  (min =  +0.00 V, max =  +0.00 V)  ALARM
		in8:            +3.09 V  (min =  +0.00 V, max =  +0.00 V)  ALARM
		fan1:          3452 RPM  (min =    0 RPM)
		fan2:          3461 RPM  (min =    0 RPM)
		fan3:          3400 RPM  (min =    0 RPM)
		fan4:          7848 RPM  (min =    0 RPM)
		fan5:             0 RPM  (min =    0 RPM)
		SYSTIN:         +22.0 C  (high =  +0.0 C, hyst =  +0.0 C)  ALARM  sensor = CPU diode
		CPUTIN:        +123.5 C  (high = +80.0 C, hyst = +75.0 C)  ALARM  sensor = CPU diode
		AUXTIN:         +25.0 C  (high = +80.0 C, hyst = +75.0 C)  sensor = thermistor
		PCH_CHIP_TEMP:   +0.0 C  
		PCH_CPU_TEMP:    +0.0 C  
		PCH_MCH_TEMP:    +0.0 C  
		intrusion0:    ALARM
		intrusion1:    ALARM
		beep_enable:   disabled
		
		i350bb-pci-0400
		Adapter: PCI adapter
		loc1:         +38.0 C  (high = +120.0 C, crit = +110.0 C)
		
		coretemp-isa-0000
		Adapter: ISA adapter
		Physical id 0:  +26.0 C  (high = +84.0 C, crit = +100.0 C)
		Core 0:         +22.0 C  (high = +84.0 C, crit = +100.0 C)
		Core 1:         +23.0 C  (high = +84.0 C, crit = +100.0 C)
		Core 2:         +26.0 C  (high = +84.0 C, crit = +100.0 C)
		Core 3:         +22.0 C  (high = +84.0 C, crit = +100.0 C)