Notepad:Dell OpenManage

from Repository/OMSA

# Set up the Dell OpenManage Repository at http://linux.dell.com/repo/hardware, like this:
wget -q -O - http://linux.dell.com/repo/community/bootstrap.cgi | bash
# Older
# wget -q -O - http://linux.dell.com/repo/hardware/latest/bootstrap.cgi | bash
# Optional Install OpenManage Server Administrator:
yum install srvadmin-all

To Update Bios Repository/firmware - DellLinuxWiki

# set up repos
wget -q -O - http://linux.dell.com/repo/community/bootstrap.cgi | bash
wget -q -O - http://linux.dell.com/repo/firmware/bootstrap.cgi | bash
wget -q -O - http://linux.dell.com/repo/hardware/latest/bootstrap.cgi | bash
# install firmware tools
yum install dell_ft_install
yum -y install firmware-addon-dell
# install BIOS update
yum -y install $(bootstrap_firmware)
update_firmware

Full Order

install net-snmp, net-snmp-utils then use 'chkconfig' and 'service' to make sure it is running, and will start on subsequent boots

yum -y install net-snmp net-snmp-utils
chkconfig snmpd on
chkconfig snmptrapd on

yum -y install OpenIPMI
chkconfig ipmi on
service ipmi start

wget -q -O - http://linux.dell.com/repo/hardware/latest/bootstrap.cgi | bash
wget -q -O - http://linux.dell.com/repo/community/bootstrap.cgi | bash
wget -q -O - http://linux.dell.com/repo/firmware/bootstrap.cgi | bash

Note for CentOS4 is only supported through version 6.3

wget -q -O - http://linux.dell.com/repo/hardware/OMSA_6.3/bootstrap.cgi | bash

might work

Get a full list of packages

rpm -qa --qf "%{name}-%{version}-%{release}.%{arch}\n"