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发表于 2003-3-15 13:18:41
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言过了....
Installing lunar without CD burner
On Tue, Jul 16, 2002 at 09:59:12PM +0200, Jasper Huijsmans wrote:
> Hello list,
>
> I'd like to try Lunar linux, but I don't have a CD burner. Is it
> possible to install Lunar without starting from CD? I would guess yes.
> Has anyone tried that?
I did that, successfully. "How" follows:
---
Suppose you don't have a CD-ROM drive or an installation ISO available, but
you want to turn your existing linux installation into Lunar-Linux.
This will practically mean wiping out whatever you have left of your
current distribution and starting over with the new one. Here's what
you need:
- One hard disk partition with enough space to hold the contents of
the installation ISO. Also you can't install to this partition; two
separate hard disks are a good idea.
- Loopback device support in your kernel (for copying the contents if
of the ISO to the partition)
0. Of course, as always when you're installing something, back up
whatever important you have on your hard disk.
1. Copy the contents of the ISO to your temporary partition. For
example, I wanted to install Lunar on the first disk (/dev/hda), and
used an empty 300-meg ext2 partition /dev/hdb4 to contain a copy of the
ISO during the installation. The procedure went like this:
...
-rw-r--r-- 1 root root 161546240 May 29 01:37 lunar-20020503.iso
golem:/tmp# mount ./lunar-20020503.iso /mnt -t iso9660 -o loop=/dev/loop0
golem:/tmp# mount /dev/hdb4 /mnt2 -t ext2
golem:/tmp# cp -Rp /mnt/* /mnt2
>From now on, we'll assume that you've mounted the ISO to /mnt and the
temporary volume to /mnt2.
2. Next we need to boot the kernel which resides on the temporary
partition (/mnt2/isolinux/linux), and mount the file
(/mnt2/isolinux/initrd.gz) as the root file system. We can do this with
lilo. Create a temporary lilo.conf.tmp which contains the following:
--begin /tmp/lilo.conf--
boot=/dev/fd0
vga=normal
image=/mnt2/isolinux/linux
label=lunar-install
ramdisk=8192
initrd=/mnt2/isolinux/initrd.gz
root=/dev/ram0
--begin /tmp/lilo.conf--
This one will make a boot floppy disk which will boot into your newly
born temporary install disk. If you wanted to boot straight from your
hard disk, you could use boot=/dev/hda (which installs on the MBR of the
first disk), but it will of course wipe your current boot sector. I did
it and got problems - use with caution ;)
Then run lilo to write the boot sector to the floppy:
root at golem:/tmp# lilo -C ./lilo.conf
Warning: LBA32 addressing assumed
Added lunar-install *
root at golem:/tmp#
3. Not so fast! Don't reboot yet. The installation is (as of the time of
writing this, at least) configured to run the file
/usr/sbin/lunar.install if it is booted on a read-only device (such as a
CD-ROM), and to delete that file if it is booted on a hard disk. This
causes an unpleasant surprise to the unaware (at least to me it did ;)
Before booting the temporary disk, you must change the file
/mnt2/etc/init.d/lunar (which is run at the boot time) so that it won't
delete that precious file:
--begin /mnt2/etc/init.d/lunar--
if [ -x /usr/sbin/lunar.install ]; then
# comment out this line:
# /bin/rm -f /usr/sbin/lunar.install 2> /dev/null ||
/usr/sbin/lunar.install
fi
--end /mnt2/etc/init.d/lunar--
4. Now let's boot with the floppy disk. If everything goes fine, first
the installer will mount the initrd image as root, containing some
kernel modules. You should load all kernel modules which you will need
to access your temporary hard disk, in the same manner as you would have
to load your CD-ROM driver. For example, if you were using /dev/sdb4
instead of /dev/hda4 for your temporary disk, select your SCSI driver,
etc. etc. Most IDE ATA/100 drivers and similar are already compiled in
the installation kernel, I think, so you don't need to take care of
those. When comes the time to select your root device, you should
select the same temporary device as before, except that it is now in
devfs-style path since the installer supports only devfs. For example,
if the temporary partition was /dev/hdb4 in the normal /dev system, it's
/devices/discs/disc1/part4 now. Go to the shell and check if you're
unsure.
5. After this you can hopefully manage to continue installing as if you
were booting from CD-ROM; the installer prompts to repartition and
format your partitions and swap spaces, etc. Don't wipe out your
temporary partition yet 
6. Finally, the installer lets you configure the kernel and compiles it,
and then reboots - or alternatively lets you go to the shell to do
whatever you want to do. This is a good change to move the installer
out of the way so that it won't be run again when you boot for the
second time. (Remember the change we made in step 3?) Just simple
"mv /mnt/root/usr/sbin/lunar.install /mnt/root/usr/sbin/lunar.install.old"
will do.
7. If everything goes fine, you've got a fresh installation with minimal
default settings (I had to do 'lin dhcpcd', for example, to get the
network up). Enjoy.
---
Antti.
P.S. After I installed my system the thought that you could install
lunar straight from the ISO image via the loopback filesystem popped
into my mind, but I was too lazy to reinstall my system, testing if it
would work for real. But you might want to try if you're brave enough
-----------
什么是最好---没有最好的
!!!!!
lunar
可能有它存在的必要,但Gentoo.真的很"博大"---作了很多工作,用了就知道!!!
<一句话,都是从source来的,都是同一个爹妈生的,能有多不一样吗?> |
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