To monitor the hardware of a server (fans/power/chassis) you'll need to install and setup IPMI.
yum install ipmitool service start ipmi
You should have a /dev/ipmi0 now that acts as the interface to the IPMI board. You can list all the sensors you're able to monitor:
To setup an IP address use the following commands:
ipmitool lan print 1 ipmitool lan set 1 ipaddr 10.3.1.190 ipmitool lan set 1 netmask 255.255.255.0 ipmitool lan set 1 defgw ipaddr 10.3.1.1
Then setup the user to allow a login
ipmitool user set name 3 ipmi ipmitool user set password 3 password ipmitool user enable 3 ipmitool user priv 3 4 ipmitool user list
You may have to reset the IPMI board for IP address changes to take effect.
ipmitool mc reset cold