In Linux and Unix, creating ISO images is a piece of cake. In this short article, I will show you how to create ISO images from files on your hard drive, with the mkisofs command.
Syntax: mkisofs -o /destination/for/new_.iso /path/to/directory/to/iso
# mkdir -p /root/backup
# mkisofs -o /root/backup/work.iso /home/mike/backup_work1/
So, I have just created the /root/backup/work.iso ISO image, from everything contained by the /home/mike/backup_work1/ directory.