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* docs/grub.texi (Network): Update instructions on generating netboot

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Vladimir 'phcoder' Serbinenko 2012-12-10 22:22:23 +01:00
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ChangeLog
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@ -1,3 +1,8 @@
2012-12-10 Vladimir Serbinenko <phcoder@gmail.com>
* docs/grub.texi (Network): Update instructions on generating netboot
image.
2012-12-10 Vladimir Serbinenko <phcoder@gmail.com>
* grub-core/disk/cryptodisk.c (grub_cmd_cryptomount): Strip brackets

35
docs/grub.texi
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@ -2080,34 +2080,35 @@ The following properties are supported by all components:
@node Network
@chapter Booting GRUB from the network
The following instructions only work on PC BIOS systems where the Preboot
eXecution Environment (PXE) is available.
The following instructions don't work for *-emu, i386-qemu, i386-coreboot,
i386-multiboot, mips_loongson, mips-arc and mips_qemu_mips
To generate a PXE boot image, run:
To generate a netbootable directory, run:
@example
@group
grub-mkimage --format=i386-pc-pxe --output=grub.pxe --prefix='(pxe)/boot/grub' pxe pxecmd
grub-mknetdir --net-directory=/srv/tftp --subdir=/boot/grub -d /usr/lib/grub/<platform>
@end group
@end example
Copy @file{grub.pxe}, @file{/boot/grub/*.mod}, and @file{/boot/grub/*.lst}
to the PXE (TFTP) server, ensuring that @file{*.mod} and @file{*.lst} are
accessible via the @file{/boot/grub/} path from the TFTP server root. Set
the DHCP server configuration to offer @file{grub.pxe} as the boot file (the
@samp{filename} option in ISC dhcpd).
E.g. for i386-pc:
You can also use the @command{grub-mknetdir} utility to generate an image
and a GRUB directory tree, rather than copying files around manually.
@example
@group
grub-mknetdir --net-directory=/srv/tftp --subdir=/boot/grub -d /usr/lib/grub/i386-pc
@end group
@end example
Then follow instructions printed out by grub-mknetdir on configuring your DHCP
server.
After GRUB has started, files on the TFTP server will be accessible via the
@samp{(pxe)} device.
@samp{(tftp)} device.
The server and gateway IP address can be controlled by changing the
@samp{(pxe)} device name to @samp{(pxe:@var{server-ip})} or
@samp{(pxe:@var{server-ip}:@var{gateway-ip})}. Note that this should be
changed both in the prefix and in any references to the device name in the
configuration file.
The server IP address can be controlled by changing the
@samp{(tftp)} device name to @samp{(tftp,@var{server-ip})}. Note that
this should be changed both in the prefix and in any references to the
device name in the configuration file.
GRUB provides several environment variables which may be used to inspect or
change the behaviour of the PXE device: