Net-SNMP and lm-sensors on Ubuntu 10.04
Notes
This is a Wiki tutorial for using Net-SNMP and lm-sensors on Ubuntu 10.04.1 LTS.
Source Download
You can download the latest sources of Net-SNMP from here:
Net-SNMP Download Page
You can download the latest sources of lm-sensors from here:
lm-sensors Download Page
Configure lm-sensors
Ubuntu 10.04.1 includes lm-sensors 3.1.2 pre-installed. To verify the lm-sensors version, type the following:
> sensors -v sensors version 3.1.2 with libsensors version 3.1.2
lm-sensors needs to be configured using sensors-detect before it can be used. sensors-detect is an interactive script for detecting hardware sensor chips. Run the following:
> sudo sensors-detect
Following sensors-detect, reboot your system, or use the following command to load the necessary kernel modules:
> sudo /etc/init.d/module-init-tools start
To verify that lm-sensors is operating properly, use the sensors command. Example output is shown below.
> sensors coretemp-isa-0000 Adapter: ISA adapter Core 0: +36.0°C (high = +82.0°C, crit = +100.0°C) coretemp-isa-0001 Adapter: ISA adapter Core 3: +36.0°C (high = +82.0°C, crit = +100.0°C) coretemp-isa-0002 Adapter: ISA adapter Core 1: +36.0°C (high = +82.0°C, crit = +100.0°C) coretemp-isa-0003 Adapter: ISA adapter Core 2: +32.0°C (high = +82.0°C, crit = +100.0°C) it8718-isa-0290 Adapter: ISA adapter in0: +1.34 V (min = +0.00 V, max = +4.08 V) in1: +1.98 V (min = +0.00 V, max = +4.08 V) in2: +3.30 V (min = +0.00 V, max = +4.08 V) in3: +2.93 V (min = +0.00 V, max = +4.08 V) in4: +0.80 V (min = +0.00 V, max = +4.08 V) in5: +0.21 V (min = +0.14 V, max = +0.26 V) in6: +0.10 V (min = +0.00 V, max = +4.08 V) in7: +3.06 V (min = +0.00 V, max = +4.08 V) Vbat: +3.23 V fan1: 0 RPM (min = 0 RPM) fan2: 0 RPM (min = 0 RPM) fan3: 0 RPM (min = 0 RPM) fan4: 1834 RPM (min = 0 RPM) temp1: +37.0°C (low = +127.0°C, high = +127.0°C) sensor = thermistor temp2: +27.0°C (low = +127.0°C, high = +127.0°C) sensor = thermal diode temp3: -2.0°C (low = +127.0°C, high = +127.0°C) sensor = thermistor cpu0_vid: +1.219 V
Install and Configure Net-SNMP
Ubuntu 10.04 does not have Net-SNMP pre-installed. To install basic Net-SNMP functionality, run the following:
> sudo apt-get install snmp > sudo apt-get install snmpd
Several other SNMP packages are available for Ubuntu. The Ubuntu Software Center (Applications > Ubuntu Software Center) is a good resource for determining which packages are currently installed (search for "snmp").
To test that the SNMP Daemon was successfully installed, run the following:
> snmpwalk -v 2c -c public localhost system
General system information should be printed to the terminal window.
The SNMP Daemon requires additional setup. The snmpconf command is an interactive script for configuring Net-SNMP functionality (it can be used to generate snmp.conf and snmpd.conf). Run the following:
> sudo snmpconf -i -g basic_setup
NOTE: If you are unfamiliar Net-SNMP, it might be easier to create a simple snmpd.conf file manually. Using a text editor, create a file named "snmpd.conf". Add the following text:
rocommunity public
Copy the new snmpd.conf file to the correct path (In Ubuntu, the default paths for Net-SNMP applications are slightly different):
> cp /usr/share/snmp/snmpd.conf /etc/snmp/snmpd.conf
Restart the SNMP daemon:
> /etc/init.d/snmpd restart
Test the lm-sensors MIB. The OID for the lm-sensors MIB is 1.3.6.1.4.1.2021.13.16.
> snmpwalk -v 2c -c public localhost lmSensors
> snmpwalk -v 2c -c public localhost 1.3.6.1.4.1.2021.13.16.
