Home page: http://mkcdrec.sourceforge.net/
mkCDrec makes a bootable (El Torito) disaster recovery image (CDrec.iso), including backups of the linux system to the same CD-ROM (or CD-RW) if space permits, or to a multi-volume CD-ROM set. Otherwise, the backups can be stored on another local disk, NFS disk or (remote) tape.
Please consider to use 'Relax and Recover (rear)' instead - https://relax-and-recover.org/
mkCDrec is still useful for older configurations and where the kernel <2.6