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SOLVED:syslinux boot iso porteus.cfg file
Posted: 12 Apr 2025, 13:08
by francois
I would like to boot "porteus".iso to use syslinux as my bootloader instead of grub.
Here is my 40_custom entry for grub:
Code: Select all
menuentry "Porteus5.0 XFCE x86-64 ISO" {
insmod part_msdos
insmod ext2
set root=(hd1,3)
set isofile="/isos/Porteus-XFCE-v5.0-x86_64.iso"
search --no-floppy --file --set=root $isofile
loopback loop $isofile
linux (loop)/boot/syslinux/vmlinuz from=$isofile changes=/50_porteus login=root extramod=/50_porteus/xfce
initrd (loop)/boot/syslinux/initrd.xz
}
The custom porteus.cfg file of porteus is:
Code: Select all
LABEL GRAPHICAL
MENU LABEL Graphics mode
KERNEL /boot/syslinux/vmlinuz
INITRD /boot/syslinux/initrd.xz
APPEND changes=/porteus
TEXT HELP
Run Porteus the best way we can.
Try to autoconfigure graphics
card and use the maximum allowed
resolution. If booting from a
non-posix (FAT/NTFS) drive,
see the Saving Changes Help
below for how to save changes.
ENDTEXT
What would you propose?
Thanks.
syslinux boot iso porteus.cfg file
Posted: 12 Apr 2025, 13:16
by francois
syslinux boot iso porteus.cfg file
Posted: 12 Apr 2025, 13:49
by Ed_P
francois wrote: ↑12 Apr 2025, 13:08
What would you propose?
F12 key and change your porteus.cfg file's APPEND to be:
APPEND changes=/50_porteus login=root extramod=/50_porteus/xfce
Added in 8 minutes 24 seconds:
BTW
Code: Select all
set root=(hd1,3) <<<< Not needed
set isofile="/isos/Porteus-XFCE-v5.0-x86_64.iso"
search --no-floppy --file --set=root $isofile <<<< Root set here
syslinux boot iso porteus.cfg file
Posted: 12 Apr 2025, 20:36
by Rapha_
An example to boot an ISO with Syslinux and porteus.cfg file :
LABEL ISO-17
MENU LABEL Iso (LXQT-v5.01 / May-2024 / rootcopy)
KERNEL /boot/syslinux/boot_v5.01_2024/vmlinuz
INITRD /boot/syslinux/boot_v5.01_2024/initrd.xz
APPEND from=/dev/sda1/Iso_linux/Porteus/Porteus-XFCE-v5.01-x86_64_May-2024.iso rootcopy=/mnt/sda1/porteus/rootcopy/ extramod=/mnt/sda1/porteus/modules kmap=fr timezone=Europe/Paris
TEXT HELP
from=/dev/sda1/Iso_linux/Porteus/Porteus-XFCE-v5.01-x86_64_May-2024.iso
rootcopy=/mnt/sda1/porteus/rootcopy/
extramod=/mnt/sda1/porteus/modules
kmap=fr
timezone=Europe/Paris
ENDTEXT
syslinux boot iso porteus.cfg file
Posted: 12 Apr 2025, 23:31
by Ed_P
An impressive menu
Ralpha_.
I did not know that ISO booting was possible that way.
syslinux boot iso porteus.cfg file
Posted: 15 Apr 2025, 12:36
by francois
@rapha:
Here is what worked for me:
Code: Select all
LABEL ISO-TOSHIBA
MENU LABEL Iso (XFCE-v5.01)
KERNEL /boot/syslinux/vmlinuz
INITRD /boot/syslinux/initrd.xz
APPEND from=/dev/sda5/isos/Porteus-XFCE-v5.x.iso changes=/mnt/sda5/5.x extramod=/mnt/sda5/5.x/modules kmap=ca timezone=America/Montreal
TEXT HELP
Run Porteus avec methode de rapha.
ENDTEXT
1) Presently porteus /boot/porteus config is on /mnt/sda7. I imagine that setting it on /mnt/sda1 would be better, isn't?
2) About the rootcopy option that I did not included in my syslinux invocation, what is the advantages of resorting to that option?
Merci grandement!
syslinux boot iso porteus.cfg file
Posted: 15 Apr 2025, 16:12
by Rapha_
francois wrote: ↑15 Apr 2025, 12:36
1) Presently porteus /boot/porteus config is on /mnt/sda7. I imagine that setting it on /mnt/sda1 would be better, isn't?
/boot/syslinux/
porteus.cfg file must be in the boot disk...
francois wrote: ↑15 Apr 2025, 12:36
2) About the rootcopy option that I did not included in my syslinux invocation, what is the advantages of resorting to that option?
With a
rootcopy dir allows me to use a basic, clean, uncompromised, read-only configuration. Therefore, it's secure.
(
This isn't very easy to complete, as you have to find the essential files required for a configuration)
You can also experiment with the usefulness of a particular file.
syslinux boot iso porteus.cfg file
Posted: 15 Apr 2025, 16:47
by Ed_P
Rapha_ wrote: ↑15 Apr 2025, 16:12
With a rootcopy dir allows me to use a basic, clean, uncompromised, read-only configuration.
I use changes=EXIT for that purpose.
syslinux boot iso porteus.cfg file
Posted: 15 Apr 2025, 19:15
by francois
@rapha:
/boot/syslinux/porteus.cfg file must be in the boot disk...
For sure it is on the Porteus-x.iso, but read-only, thus not accessible for modification.
This is why I suspect that installation of syslinux on /dev/sda1 is a prerequisite for the Porteus-x.iso to be invoked and be booted.
Syslinux is like grub, it has to be installed first and then invoked to permit booting of the iso.
Don't you have a /mnt/sda1/boot/syslinux/porteus.cfg or the like on your linux box?
Thanks.
syslinux boot iso porteus.cfg file
Posted: 15 Apr 2025, 22:07
by Ed_P
Are you saying your ISO doesn't boot?
syslinux boot iso porteus.cfg file
Posted: 15 Apr 2025, 23:20
by Rapha_
francois wrote: ↑15 Apr 2025, 19:15
This is why I suspect that installation of syslinux on /dev/sda1 is a prerequisite for the Porteus-x.iso to be invoked and be booted.
Syslinux is like grub, it has to be installed first and then invoked to permit booting of the iso.
Absolutely ! You need a bootable disk (USB or HDD) with a copy of /boot/linux/
You also need to copy the exact same two files from the ISO (
vmlinuz +
initrd.xz*) to a subfolder of /boot/syslinux to boot it.
* initrd.
zst for Porteu
x
Note: vmlinuz + initrd.xz are
specific to each ISO
syslinux boot iso porteus.cfg file
Posted: 17 Apr 2025, 20:21
by francois
francois wrote: ↑15 Apr 2025, 12:36
@rapha:
Here is what worked for me:
Code: Select all
LABEL ISO-TOSHIBA
MENU LABEL Iso (XFCE-v5.01)
KERNEL /boot/syslinux/vmlinuz
INITRD /boot/syslinux/initrd.xz
APPEND from=/dev/sda5/isos/Porteus-XFCE-v5.x.iso changes=/mnt/sda5/5.x extramod=/mnt/sda5/5.x/modules kmap=ca timezone=America/Montreal
TEXT HELP
Run Porteus avec methode de rapha.
ENDTEXT
1) Presently porteus /boot/porteus config is on /mnt/sda7. I imagine that setting it on /mnt/sda1 would be better, isn't?
2) About the rootcopy option that I did not included in my syslinux invocation, what is the advantages of resorting to that option?
Merci grandement!
Indeed it has booteed, as I wrote: Here is what worked for me: