Commit 7e9dd124 authored by Nico Schottelius's avatar Nico Schottelius Committed by Linus Torvalds
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[PATCH] Updated Documentation/nfsroot.txt

I today booted the first time my embedded device using Linux,
which was booted by pxelinux, which then bootet itself from the nfsroot.

This went pretty fine, but when I was reading through
Documentation/nfsroot.txt I saw that there are some more modern versions
available of loading the kernel and passing parameters.

Signed-off-by: default avatarNico Schottelius <>
Signed-off-by: default avatarAndrew Morton <>
Signed-off-by: default avatarLinus Torvalds <>
parent d129bceb
......@@ -3,6 +3,7 @@ Mounting the root filesystem via NFS (nfsroot)
Written 1996 by Gero Kuhlmann <>
Updated 1997 by Martin Mares <>
Updated 2006 by Nico Schottelius <>
......@@ -168,7 +169,6 @@ depend on what facilities are available:
root. If it got a BOOTP answer the directory name in that answer
is used.
3.2) Using LILO
When using LILO you can specify all necessary command line
parameters with the 'append=' command in the LILO configuration
......@@ -177,7 +177,11 @@ depend on what facilities are available:
LILO and its 'append=' command please refer to the LILO
3.3) Using loadlin
3.3) Using GRUB
When you use GRUB, you simply append the parameters after the kernel
specification: "kernel <kernel> <parameters>" (without the quotes).
3.4) Using loadlin
When you want to boot Linux from a DOS command prompt without
having a local hard disk to mount as root, you can use loadlin.
I was told that it works, but haven't used it myself yet. In
......@@ -185,7 +189,7 @@ depend on what facilities are available:
lar to how LILO is doing it. Please refer to the loadlin docu-
mentation for further information.
3.4) Using a boot ROM
3.5) Using a boot ROM
This is probably the most elegant way of booting a diskless
client. With a boot ROM the kernel gets loaded using the TFTP
protocol. As far as I know, no commercial boot ROMs yet
......@@ -194,6 +198,13 @@ depend on what facilities are available:
and its mirrors. They are called 'netboot-nfs' and 'etherboot'.
Both contain everything you need to boot a diskless Linux client.
3.6) Using pxelinux
Using pxelinux you specify the kernel you built with
"kernel <relative-path-below /tftpboot>". The nfsroot parameters
are passed to the kernel by adding them to the "append" line.
You may perhaps also want to fine tune the console output,
see Documentation/serial-console.txt for serial console help.
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