Manu Hack wrote:
>>>
>> If a couple of reboots is ok for you, the following method might work.
>
> Yes, and thanks a lot for the instruction.
>
>> You can use 'dd' to clone hda2 to hda1. Boot your system with
>> "init=/bin/bash". When you get to the bash prompt, do
>>
>> bash# dd if=/dev/hda2 of=/dev/hda1
>>
>> When that completes, you would have your installation available on both
>> the partitions. The 5GB hda1 would contain a filesystem that is only 1GB
>> large. Restart your system. You would boot normally with a 1GB root.
>>
>> Edit "/boot/grub/menu.lst" and add an entry for the linux on hda1.
>> set root to (hd0,0) and append root=/dev/hda1 for the kernel line of the
>> new entry.
>>
>> mkdir /tmp/newroot; mount /dev/hda1 /tmp/newroot
>>
>> Edit the file /tmp/newroot/boot/grub/menu.lst and replace (hd0,1) with
>> (hda0,0) and root=/dev/hda2 with root=/dev/hda1. Similarly fix the root
>> filesystem entry in /tmp/newroot/etc/fstab by changing /dev/hda2 to
>> /dev/hda1.
>>
>> Now you should be able to boot into either of your two partitions.
>
> So I got two grub/menu.lst, but how grub knows which one to read (one
> is hda1 and one is hda2)?

Grub will read the menu.lst from the partition that contained
/boot/grub/menu.lst when "grub-install" was run.

>> Feel free to post any problems you may have and make sure you take a
>> backup of important files before proceeding.
>>
>
> Finally I followed your instruction and now I got what I wanted.
> Really thanks a lot and hopefully this can others too. (not to
> mention I learned a lot!)

This is one important reason why I am in love with linux. A little
curiosity and it lets you learn everything you care about hardware/software.


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