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iso-generation

@benchflow-ai/skillsbench
7
0

Create bootable ISO images using xorriso, genisoimage, or mkisofs. Use when building live CDs, installation media, rescue disks, or custom Linux distributions.

Install Skill

1Download skill
2Enable skills in Claude

Open claude.ai/settings/capabilities and find the "Skills" section

3Upload to Claude

Click "Upload skill" and select the downloaded ZIP file

Note: Please verify skill by going through its instructions before using it.

SKILL.md

name iso-generation
description Create bootable ISO images using xorriso, genisoimage, or mkisofs. Use when building live CDs, installation media, rescue disks, or custom Linux distributions.

Bootable ISO Generation

Create bootable ISO images for CD/DVD/USB distribution.

Directory Structure

Standard ISO layout:

iso/
├── boot/
│   ├── grub/
│   │   └── grub.cfg
│   └── isolinux/
│       ├── isolinux.bin
│       ├── isolinux.cfg
│       └── ldlinux.c32
├── EFI/
│   └── BOOT/
│       └── BOOTX64.EFI
├── live/
│   ├── vmlinuz
│   ├── initrd.img
│   └── filesystem.squashfs
└── .disk/
    └── info

Basic ISO Creation with xorriso

xorriso -as mkisofs \
  -o output.iso \
  -isohybrid-mbr /usr/lib/ISOLINUX/isohdpfx.bin \
  -c boot/isolinux/boot.cat \
  -b boot/isolinux/isolinux.bin \
  -no-emul-boot \
  -boot-load-size 4 \
  -boot-info-table \
  iso/

BIOS + UEFI Hybrid ISO

xorriso -as mkisofs \
  -o output.iso \
  -isohybrid-mbr /usr/lib/ISOLINUX/isohdpfx.bin \
  -c boot/isolinux/boot.cat \
  -b boot/isolinux/isolinux.bin \
  -no-emul-boot \
  -boot-load-size 4 \
  -boot-info-table \
  -eltorito-alt-boot \
  -e EFI/efiboot.img \
  -no-emul-boot \
  -isohybrid-gpt-basdat \
  iso/

Using genisoimage

genisoimage \
  -o output.iso \
  -b boot/isolinux/isolinux.bin \
  -c boot/isolinux/boot.cat \
  -no-emul-boot \
  -boot-load-size 4 \
  -boot-info-table \
  -J -R -V "MyLiveCD" \
  iso/

ISO Options

Option Description
-o Output filename
-b Boot image (El Torito)
-c Boot catalog
-no-emul-boot No disk emulation
-boot-load-size 4 Load 4 sectors
-boot-info-table Patch boot image
-J Joliet extensions
-R Rock Ridge extensions
-V Volume label

Make ISO Bootable from USB

# Using isohybrid
isohybrid output.iso

# Or with xorriso (use -isohybrid-mbr flag)

Testing ISO

# Test with QEMU (BIOS)
qemu-system-x86_64 -cdrom output.iso -boot d

# Test with QEMU (UEFI)
qemu-system-x86_64 -cdrom output.iso -boot d \
  -bios /usr/share/OVMF/OVMF_CODE.fd

Creating EFI Boot Image

# Create FAT image for EFI
dd if=/dev/zero of=efiboot.img bs=1M count=10
mkfs.vfat efiboot.img
mmd -i efiboot.img ::/EFI ::/EFI/BOOT
mcopy -i efiboot.img bootx64.efi ::/EFI/BOOT/