“UbuntuHelp:GrubHowto/BootFloppy”的版本间的差异
来自Ubuntu中文
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| 第7行： | 第7行： | ||
1. Obtain root privileges. | 1. Obtain root privileges. | ||
<pre><nowiki> | <pre><nowiki> | ||
| − | + | sudo -s </nowiki></pre> | |
2. Format the floppy with the ext2 filesystem: | 2. Format the floppy with the ext2 filesystem: | ||
<pre><nowiki> | <pre><nowiki> | ||
| − | + | mke2fs /dev/fd0 </nowiki></pre> | |
3. Mount the floppy and copy the files that GRUB needs to make it bootable: | 3. Mount the floppy and copy the files that GRUB needs to make it bootable: | ||
<pre><nowiki> | <pre><nowiki> | ||
| − | + | mount /dev/fd0 /media/floppy | |
| − | + | mkdir /media/floppy/boot | |
| − | + | mkdir /media/floppy/boot/grub | |
| − | + | cd /boot/grub | |
| − | + | cp stage1 stage2 /media/floppy/boot/grub </nowiki></pre> | |
If you want to boot the operating system already installed on the | If you want to boot the operating system already installed on the | ||
| 第30行： | 第30行： | ||
prompt (grub >). Enter these commands: | prompt (grub >). Enter these commands: | ||
<pre><nowiki> | <pre><nowiki> | ||
| − | + | device (fd0) /dev/fd0 | |
| − | + | root (fd0) | |
| − | + | setup (fd0) | |
| − | + | quit </nowiki></pre> | |
5. At this point, you have a bootable floppy. If you added the extra | 5. At this point, you have a bootable floppy. If you added the extra | ||
| 第45行： | 第45行： | ||
the boot record is named boot.mbr. | the boot record is named boot.mbr. | ||
<pre><nowiki> | <pre><nowiki> | ||
| − | + | dd if=/dev/hda of=/media/floppy/boot.mbr bs=512 count=1 </nowiki></pre> | |
To restore it, you would just reverse the parameters of the dd | To restore it, you would just reverse the parameters of the dd | ||
command: | command: | ||
<pre><nowiki> | <pre><nowiki> | ||
| − | + | dd if=/media/floppy/boot.mbr of=/dev/hda bs=512 count=1 </nowiki></pre> | |
[[category:CategoryDocumentation]] | [[category:CategoryDocumentation]] | ||
[[category:UbuntuHelp]] | [[category:UbuntuHelp]] | ||
2007年5月24日 (四) 10:00的版本
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Making a GRUB boot floppy.
GRUB (GRand Unified Bootloader) is the boot manager installed by default in recent versions of Ubuntu Linux. It is an effort by the GNU project to provide a bootloader that supports the greatest number of operating systems. This document explains how to make a boot floppy that can either boot an installed operating system or present you with a GRUB command shell so that you can enter commands directly. It assumes that you are making the diskette on an Ubuntu Linux box.
1. Obtain root privileges.
sudo -s
2. Format the floppy with the ext2 filesystem:
mke2fs /dev/fd0
3. Mount the floppy and copy the files that GRUB needs to make it bootable:
mount /dev/fd0 /media/floppy mkdir /media/floppy/boot mkdir /media/floppy/boot/grub cd /boot/grub cp stage1 stage2 /media/floppy/boot/grub
If you want to boot the operating system already installed on the machine you are making the floppy from, also copy /boot/grub/menu.lst and /boot/grub/device.map to the corresponding directories on the floppy.
4. Unmount the floppy (umount /dev/fd0), then start GRUB in interactive mode by typing grub. You will see the GRUB command prompt (grub >). Enter these commands:
device (fd0) /dev/fd0 root (fd0) setup (fd0) quit
5. At this point, you have a bootable floppy. If you added the extra files mentioned above, you should get a standard GRUB screen when you boot from it, just as if you had booted from the hard drive.
6. If you want to be extra cautious, you can save a copy of the current machine's master boot record to a file on the floppy. The following example assumes the master boot record is on device hda; the file containing the boot record is named boot.mbr.
dd if=/dev/hda of=/media/floppy/boot.mbr bs=512 count=1
To restore it, you would just reverse the parameters of the dd command:
dd if=/media/floppy/boot.mbr of=/dev/hda bs=512 count=1
