First what is IPMI?
IPMI stands for Intelligent Platform Management Interface standardized computer interface for administrators to manage computer system and monitor its operation.
It is supported by most major providers – Intel (of course), Dell, HP…
Installation is really simple:
yum install OpenIPMI OpenIPMI-tools chkconfig ipmi on service ipmi start
If you see error at last command check system log – it is possible that your hardware does not support IPMI.
To to see what you can do with it:
ipmitool help man ipmitool