From 0077eecb73ae04c29012a0243f1f58e05dafbc28 Mon Sep 17 00:00:00 2001 From: Bram Prieshof Date: Wed, 16 Nov 2022 12:21:32 +0100 Subject: [PATCH] Add 'ISO-Repack.md' --- ISO-Repack.md | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) create mode 100644 ISO-Repack.md diff --git a/ISO-Repack.md b/ISO-Repack.md new file mode 100644 index 0000000..f498146 --- /dev/null +++ b/ISO-Repack.md @@ -0,0 +1,33 @@ +# Repack linux ISO + +Commands expect to be in a root shell + +## Install needed tools +mkisofs xorriso isohybrid + +## Editing ISO image + +create workspace +`mkdir /tmp/custom_iso` +Mount image and extract it since it is read only +`mount -t iso9660 -o loop ~/original.iso /mnt/` +`tar cf - /mnt/. | (cd /tmp/custom_iso; tar xfp -)` +You can now modify the files for editing the bootloader config for example! + +## Back into an iso + +### Legacy only +Rebuild iso with mkisofs +`mkisofs -o output.iso -b syslinux/isolinux.bin -c syslinux/boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table -J -R -V "Custom ISO" /tmp/custom_iso` +Bless it with isohybrid +`isohybrid output.iso` + +### EFI and Legacy +Rebuild iso with mkisofs +`mkisofs -o output.iso -b syslinux/isolinux.bin -J -R -l -c syslinux/boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table -eltorito-alt-boot -e boot/grub/efi.img -no-emul-boot -graft-points -V "Custom ISO" /tmp/custom_iso` +Bless it with isohybrid +`isohybrid --uefi output.iso` + +### Sources +https://gist.github.com/AkdM/2cd3766236582ed0263920d42c359e0f +https://tuxfixer.com/mount-modify-edit-repack-create-uefi-iso-including-kickstart-file/ \ No newline at end of file