Gkrellm is a good utility that let us to monitoring the entire system: battery status, temperature (CPU, HDD, Video, …), fan speed. But it’s not enaught: it need help from some daemons or kernel’s modules.

Now i try to explain how to check the temperatures.

Open a term and write (like super-user):

root:~# apt-get install lm-sensors hddtemp

and after the installation

root:~# sensors-detect

you have to follow the sensors setup (use the default answers); after that, in output you see some modules

#----cut here----
# module options
<module_1>
<module_2>
#----cut here----

that you have to insert in the file /etc/modules.
(if you would start the modules immediately use like root modprobe <modulo_1> <modulo_2> )

To start the harddisk sensor:

root:~# hddtemp -d /dev/hda
(or hdb, hdc or sda, sdb: it depends from the harddisk that you would monitoring)

Now start gkrellm goo in

Function > Sensors > Temperature

Here you can find all sensors from your PC.

Tips:
If you exec
acido:~$ sensors

in output you can see all sensors (exept harddisk);

root:~# hddtemp /dev/hda
(or hdb, hdc or sda, sdb: it depends from the harddisk that you would monitoring)

in output you can see harddisk sensors;
if you would start hddtemp like a daemon (each time that you start your pc) use:

root:~# nano /etc/default/hddtemp

and set RUN_DAEMON=“true“  and  DISKS=“/dev/hda” (your harddisk).

linux, debian, gkrellm, gnome