Re: How to make a bootable hard disk image?

While on subject i would to ask a question :

Usually, I invoke it this way:

...

qemu -kernel /tmp/kernel-image -initrd /tmp/initrd -hda /tmp/guest.img

Where can we found the "guest.img", or more exactly what to put in it ? I suppose a distrubition ? Is there any small distribution, maybe without the X client (graphical interface)?