The tool to be used for creating the ISO image is dd, a low level raw data copying and conversion tool for Unix based systems. Obviously as in the command below, two options are needed for this purpose; if for the input file, and of for the output file.
sudo dd if=/dev/cdrom of=mycdrom.iso
To verify and probably to use the image at later times, simply mount the image with loop option.
sudo mount -o loop -t iso9660 mycdrom.iso /mnt
Though dd can also be used to burn ISO images (guess how easy could it be), the proper way to do it is to use cdrecord. The command below will verbosely show the burning process to the cdrom device with burnfree option enabled;
sudo cdrecord -v dev=/dev/cdrom driveropts=burnfree -data mycdrom.iso
The steps above are actually helpful to backup OS / driver CDs and DVDs as there’s no need to worry of scratched discs, and to have everything organized in one place. Hard drive space shouldn’t be an issue nowadays, but if it is, try to apply some compressions to ease the problem.
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