How to properly make a bootable iso from the contents of a directory
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I wanted to have a customized Ubuntu Live CD so:
I mounted ubuntu-18.04-desktop-amd64.iso.
Copied its content to a directory in my home folder.
Used unsquashfs filesystem.squashfs to extract the file system.
Used chroot to change the root into the extracted file system.
Uninstalled some packages I didn't need.
Used sudo mksquashfs squashfs-root filesystem.squashfs -b 1048576 -comp xz -Xdict-size 100% to pack the modified file system back into filesystem.squashfs.
Replaced the original filesystem.squashfs I extracted with the modified one.
Used genisoimage -r -V "Ubuntu" -cache-inodes -J -l -b isolinux/isolinux.bin -c isolinux/boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table -o ironpig.iso FC5/ to build a .iso (FC5 being the directory I extracted ubuntu-18.04-desktop-amd64.iso into).
But after burning ironpig.iso into a SD card with Etcher it looks like this:
But I get this by burning the original ubuntu-18.04-desktop-amd64.iso:
How can I make my.iso bootable?
usb iso
asked May 13 at 10:04
IronPig
382216
add a comment |Â
up vote
0
down vote
favorite
I wanted to have a customized Ubuntu Live CD so:
I mounted ubuntu-18.04-desktop-amd64.iso.
Copied its content to a directory in my home folder.
Used unsquashfs filesystem.squashfs to extract the file system.
Used chroot to change the root into the extracted file system.
Uninstalled some packages I didn't need.
Used sudo mksquashfs squashfs-root filesystem.squashfs -b 1048576 -comp xz -Xdict-size 100% to pack the modified file system back into filesystem.squashfs.
Replaced the original filesystem.squashfs I extracted with the modified one.
Used genisoimage -r -V "Ubuntu" -cache-inodes -J -l -b isolinux/isolinux.bin -c isolinux/boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table -o ironpig.iso FC5/ to build a .iso (FC5 being the directory I extracted ubuntu-18.04-desktop-amd64.iso into).
But after burning ironpig.iso into a SD card with Etcher it looks like this:
But I get this by burning the original ubuntu-18.04-desktop-amd64.iso:
How can I make my.iso bootable?
usb iso
asked May 13 at 10:04
IronPig
382216
add a comment |Â
up vote
0
down vote
favorite
up vote
0
down vote
favorite
I wanted to have a customized Ubuntu Live CD so:
I mounted ubuntu-18.04-desktop-amd64.iso.
Copied its content to a directory in my home folder.
Used unsquashfs filesystem.squashfs to extract the file system.
Used chroot to change the root into the extracted file system.
Uninstalled some packages I didn't need.
Used sudo mksquashfs squashfs-root filesystem.squashfs -b 1048576 -comp xz -Xdict-size 100% to pack the modified file system back into filesystem.squashfs.
Replaced the original filesystem.squashfs I extracted with the modified one.
Used genisoimage -r -V "Ubuntu" -cache-inodes -J -l -b isolinux/isolinux.bin -c isolinux/boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table -o ironpig.iso FC5/ to build a .iso (FC5 being the directory I extracted ubuntu-18.04-desktop-amd64.iso into).
But after burning ironpig.iso into a SD card with Etcher it looks like this:
But I get this by burning the original ubuntu-18.04-desktop-amd64.iso:
How can I make my.iso bootable?
usb iso
asked May 13 at 10:04
IronPig
382216
I wanted to have a customized Ubuntu Live CD so:
I mounted ubuntu-18.04-desktop-amd64.iso.
Copied its content to a directory in my home folder.
Used unsquashfs filesystem.squashfs to extract the file system.
Used chroot to change the root into the extracted file system.
Uninstalled some packages I didn't need.
Used sudo mksquashfs squashfs-root filesystem.squashfs -b 1048576 -comp xz -Xdict-size 100% to pack the modified file system back into filesystem.squashfs.
Replaced the original filesystem.squashfs I extracted with the modified one.
Used genisoimage -r -V "Ubuntu" -cache-inodes -J -l -b isolinux/isolinux.bin -c isolinux/boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table -o ironpig.iso FC5/ to build a .iso (FC5 being the directory I extracted ubuntu-18.04-desktop-amd64.iso into).
But after burning ironpig.iso into a SD card with Etcher it looks like this:
But I get this by burning the original ubuntu-18.04-desktop-amd64.iso:
How can I make my.iso bootable?
usb iso
asked May 13 at 10:04
IronPig
382216
asked May 13 at 10:04
IronPig
382216
asked May 13 at 10:04
IronPig
382216
asked May 13 at 10:04
IronPig
382216
382216
add a comment |Â
add a comment |Â
1 Answer
1
active
oldest
votes
up vote
0
down vote
A cd typically uses iso9660 on the raw media and through the spec uses El Torito (an emulated floppy drive with a drive image) for booting along with UEFI which requires an EFI executable at /EFI/boot/bootx64.efi. The emulated floppy image is also for UEFI formated FAT32 containing the same /EFI/boot/bootx64.efi but also contains a legacy boot loader at the beginning of the image.
answered May 13 at 10:45
jdwolf
676110
Other arrangements are possible like for example a GPT partitioned CD containing an ESP.
– jdwolf
May 13 at 10:46
add a comment |Â
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
0
down vote
A cd typically uses iso9660 on the raw media and through the spec uses El Torito (an emulated floppy drive with a drive image) for booting along with UEFI which requires an EFI executable at /EFI/boot/bootx64.efi. The emulated floppy image is also for UEFI formated FAT32 containing the same /EFI/boot/bootx64.efi but also contains a legacy boot loader at the beginning of the image.
answered May 13 at 10:45
jdwolf
676110
Other arrangements are possible like for example a GPT partitioned CD containing an ESP.
– jdwolf
May 13 at 10:46
add a comment |Â
up vote
0
down vote
A cd typically uses iso9660 on the raw media and through the spec uses El Torito (an emulated floppy drive with a drive image) for booting along with UEFI which requires an EFI executable at /EFI/boot/bootx64.efi. The emulated floppy image is also for UEFI formated FAT32 containing the same /EFI/boot/bootx64.efi but also contains a legacy boot loader at the beginning of the image.
answered May 13 at 10:45
jdwolf
676110
Other arrangements are possible like for example a GPT partitioned CD containing an ESP.
– jdwolf
May 13 at 10:46
add a comment |Â
up vote
0
down vote
up vote
0
down vote
A cd typically uses iso9660 on the raw media and through the spec uses El Torito (an emulated floppy drive with a drive image) for booting along with UEFI which requires an EFI executable at /EFI/boot/bootx64.efi. The emulated floppy image is also for UEFI formated FAT32 containing the same /EFI/boot/bootx64.efi but also contains a legacy boot loader at the beginning of the image.
answered May 13 at 10:45
jdwolf
676110
A cd typically uses iso9660 on the raw media and through the spec uses El Torito (an emulated floppy drive with a drive image) for booting along with UEFI which requires an EFI executable at /EFI/boot/bootx64.efi. The emulated floppy image is also for UEFI formated FAT32 containing the same /EFI/boot/bootx64.efi but also contains a legacy boot loader at the beginning of the image.
answered May 13 at 10:45
jdwolf
676110
answered May 13 at 10:45
jdwolf
676110
answered May 13 at 10:45
jdwolf
676110
answered May 13 at 10:45
jdwolf
676110
676110
Other arrangements are possible like for example a GPT partitioned CD containing an ESP.
– jdwolf
May 13 at 10:46
add a comment |Â
Other arrangements are possible like for example a GPT partitioned CD containing an ESP.
– jdwolf
May 13 at 10:46
Other arrangements are possible like for example a GPT partitioned CD containing an ESP.
– jdwolf
May 13 at 10:46
Other arrangements are possible like for example a GPT partitioned CD containing an ESP.
– jdwolf
May 13 at 10:46
add a comment |Â
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