how to replace kernel on Ubuntu

Tom H tomh0665 at
Fri Oct 9 17:08:01 UTC 2009

> loody wrote:
>> I try to replace the kernel under my Ubuntu.
>> my questions are:
>> 1. what is UUID used for? It seems replace "root=/dev/sda1"
>>     is there any tool or command I have to do to getting this number?
>> 2. from 2.6, we use initramfs instead of initrd, but why we still need
>> to add "initrd" option in menu.lst.
>> 3. is there any restriction of kernel version to replace in Ubuntu; if
>> I replace my ubuntu with older version as 2.6.18, will it be ok?

Rakotomandimby Mihamina wrote:
> 1. # vol_id -u /dev/sda2

NoOp wrote:
> 1. Enter 'UUID' in the search bar.
> <>
> 2. Enter 'initrd' in the search bar. Click on 'Technical'
> <>
> Also:

I would add to above:

1. I prefer blkid and file to vol_id because I can get all my
partitions' UUIDs with one command:

blkid /dev/sda*

file -s /dev/sda*

(somehow, vol_id /dev/sda* does not work)

2. See also:

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