Для FreeBSD все просто:
#cd /usr/ports/sysutils/freeipmi
#make
#make install
#bmc-info
Device ID: 20
Device Revision: 1
[SDR Support]
Firmware Revision: 1.20
[Device Available (normal operation)]
IPMI Version: 1.5
Additional Device Support:
[Sensor Device]
[SDR Repository Device]
[SEL Device]
[FRU Inventory Device]
[IPMB Event Receiver]
[Chassis Device]
Manufacturer ID: B000157h
Product ID: 1Bh
Aux Firmware Revision Info: 10011500h
#sensors
1: Power Unit (Power Unit): [OK]
2: Power Redundancy (Power Unit): [Fully Redundant]
3: BMC Watchdog (Watchdog 2): [OK]
4: Scrty Violation (Platform Security Violation): [OK]
5: Physical Scrty (Platform Chassis Intrusion): [OK]
6: POST Error (System Firmware): [OK]
7: Critical Int (Critical Interrupt): [OK]
8: Memory (Memory): [Unknown]
9: Logging Disabled (Event Logging Disabled): [OK]
10: Baseboard 1.2V (Voltage): 1.21 V (low=1.14/nom=1.20/high=1.25) [OK]
11: Baseboard 1.25V (Voltage): 1.26 V (low=1.08/nom=1.24/high=1.41) [OK]
...