How to Create iso image out of a CD on Linux OS

dd can be easily remembered as “disk dump”.

• if means “input file.”
• of means “output file.”
• ISO is the resulting file that will contain all of the data that is on your CD/DVD disk.”

Put CD into CDROM

Do not mount CD. Verify if cd is mounted or not with mount command:

# mount

If cd was mouted automatically unmout it with umount command:

# umount /mnt/cdrom

Create CD-ROM ISO image with dd command:

# dd if=/dev/cdrom of=/tmp/cdimg1.iso

where if=/dev/cdrom is in the raw format

Thats it its all done you should now see a .iso file, you can use this to backup your media just in  case something goes wrong with the media