VOLUME_NAME="Ubuntu KIKA"

sudo genisoimage -r -cache-inodes -J -l \
    -b isolinux/isolinux.bin -c isolinux/boot.cat -no-emul-boot \
    -boot-load-size 4 -boot-info-table \
    -V "$VOLUME_NAME" \
    -o /tmp/new-image.iso /tmp/custom/newiso/
sudo isohybrid /tmp/new-image.iso

# optionaly update isolinux/isolinux.bin and isolinux/*.c32 with newer from syslinux, might make it more compatible with isohybrid below

sudo dd if=/tmp/new-image.iso of=/dev/sdb bs=4M status=progress