GNU/Linux Desktop Survival Guide by Graham Williams
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No Intermediate Image

The output of mkisofs can be fed directly into cdrecord if the CPU is fast enough (better than 400MHz).

The first step is to determine the image size:

  # IMG_SIZE=$(mkisofs -R -q -print-size /home 2>&1 | sed -e "s/.* = //")
  # echo $IMG_SIZE

Then write the data CD:

  # [ "0$IMG_SIZE" -ne 0 ] &&
  $ mkisofs -r /home |
    cdrecord tsize=${IMG_SIZE}s -data -