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Old 10-03-2020, 10:02 AM   #1
platypo
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Distribution: Debian, Archlinux
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PXE boot from a Raspberry Pi


I am trying to rescue an old laptop with no working cdrom and no usb-boot-support by setting up a tftp server to boot Linux Mint 20 from a Raspberry Pi running archlinux arm.

What i have so far:
  • A dhcp-server through NetworkManagers dnsmasq-feature.
  • A directory /srv/tftp owned by user/group 'dnsmasq' and 644-Privileges
  • A copy of https://mirrors.edge.kernel.org/pub/...ux-6.03.tar.gz from wich i extracted pxelinux.0 to /srv/tftp
  • A linuxmint-20-xfce-64Bit.iso mounted on /srv/tftp/image
  • A dropin-file for dnsmasq '30-tftp.conf'
    Code:
    enable-tftp
    tftp-root=/srv/tftp
    tftp-boot=/srv/tftp/pxelinux.0

  • and a file /srv/tftp/pxelinux.cfg/default that contains:
    Code:
    MENU LABEL mint
    LINUX image/casper/vmlinuz
    INITRD image/casper/initrd.lz
    APPEND file=mint/preseed/linuxmint.seed boot=casper acpi=off fetch=tftp://10.0.0.1/image/casper/filesystem.squashfs quiet splash --
So far i get a DHCP Lease and a Timeout when trying to boot (The Boot-Screen says "PXE-E32: TFTP open timeout")
I mostly followed thisToturial allthough i tried to keep it a bit simpler regarding the boot-menu and its features. I feel like i am not totally wrong with the steps above but something is missing for sure. Can someobe please give an opinion?

Last edited by platypo; 10-03-2020 at 10:05 AM.
 
Old 10-04-2020, 06:04 AM   #2
fatmac
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Maybe these will help...

https://www.raspberrypi.org/document...et_tutorial.md

https://linuxconfig.org/how-to-confi...xe-boot-server

https://docs.j7k6.org/raspberry-pi-pxe-server/
 
1 members found this post helpful.
Old 10-04-2020, 08:04 AM   #3
jmgibson1981
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Location: Tucson, AZ USA
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Guide.

Code:
dhcp-boot
You have this.

Code:
tftp-boot
Not sure if that is the whole thing but it would be a good start.

Last edited by jmgibson1981; 10-04-2020 at 08:14 AM.
 
Old 10-05-2020, 05:34 AM   #4
platypo
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Thanks for the hints. I have gotten somewhat further into the matter and was able to boot into a menu. Still being unable to load the kernel files from the server i suppose it is because i forgot to mount the image-file with -o uid/gid=981 (dnsmasq). Anyhow, i might soon be able to ask more specific questions than the entry post.
Quote:
Originally Posted by jmgibson1981 View Post
Guide.

Code:
dhcp-boot
You have this.

Code:
tftp-boot
Not sure if that is the whole thing but it would be a good start.
Thats good advice, thanks.
Right now the first problem after an update is that i cannot mount iso-files at all anymore (unknown filesystem type 'iso9660') so i'll have to make myself familiar with kernel modules or try a different approach.

Last edited by platypo; 10-05-2020 at 05:48 AM.
 
Old 10-05-2020, 08:13 AM   #5
platypo
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I think i'm making progress. After extracting vmlinuz, initrd.lz, filesystem.squashfs and custom.seed the files are being loaded from the server via pxe-boot.

Unfortunately i get a Kernelpanic (CPU: 0 PID: 1 Comm: init Not tainted 4.15.0-60-generic #67-Ubuntu) and i don't know yet wether this is due to incompatible architecture/hardware or my tftp-setup (i know very little about the boot process). If it's the first this thread could be marked as solved.

Last edited by platypo; 10-05-2020 at 08:16 AM.
 
Old 10-06-2020, 05:35 AM   #6
platypo
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Distribution: Debian, Archlinux
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Update: i could boot the laptop with the alpinelinux-netboot-files on the tftp-server pretty easy so this thread is solved.
 
  


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