OMSA enables to monitor the hardware of a Dell PowerEdge server (e.g. temperature, fan speed, etc.)
Update: Hardware monitoring on a Dell PowerEdge server is now also possible using the Linux lm-sensors package. But you may have to enable the SMBus which is disabled by default. See under related topics.
wget http://debian.marlow.dk/dists/woody/dell/pool/dellomsa-drivers_4.120-3925_i386.deb
wget http://debian.marlow.dk/dists/woody/dell/pool/dellomsa_4.120-3925_i386.deb
cd /usr/src
ln -s kernel-source-2.4.27 linux
dpkg -i dellomsa-drivers_4.120-3925_i386.deb
mkdir /var/lock/subsys
dpkg -i dellomsa_4.120-3925_i386.deb
update-rc.d dellomsaesm defaults 96 04
update-rc.d dellomsa defaults 97 03
dellomsa start
snmpwalk -v2c -c public localhost enterprises.674.10892.1
http://linux.dell.com/monitoring.shtml