How to Create an ISO File in Linux [Linux]

1. Boot up Linux.
2. Go to a terminal screen. You can usually right click on the desktop and choose this option from the drop-down menu.
   
3. Type "dd if=/dev/cdrom of=~/cdrom_image.iso".
4. Or type "mkisofs -o /tmp/cd.iso /tmp/directory/" To make an ISO from files on your hard drive.