How To Make ISO image from CD

Use following command to create ISO image of CD
Note: /dev/hdc is my cdrom device
1. dd if=/dev/hdc of=/home/nikesh/example.iso bs=2048 conv=notrunc
— OR –

2. cat /dev/hdc > /home/nikesh/example.iso
Both commands do exactly the same, but the first one might be easier to remember.