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**Qqmike** · Jan 09, 2008, 05:23 AM

Re: Kernel-Images and Updates

In your GRUB boot menu, /boot/grub/menu.lst, between the *** Begin Automagic and *** End Automagic lines, there is a section specifying how many kernels should be put into the menu.lst. You want it to say
# howmany=all

That should do the trick and keep all kernels visible to you upon booting your PC.
Caution: I have no experience updating versions (say from Fiesty to Gutsy)! -- I always do fresh installs.

**Rog131** · Jan 09, 2008, 07:04 AM

Re: Kernel-Images and Updates

Checking:

- you are using linux-image-2.6.20-16
- you don't want kernel upgrades
- you want to download backup kernel

Will this update remove the old but running feisty kernel 2.6.20... and leave me with two 2.6.22... ?

I don't think so. Here it just adds new kernel as default start kernel. Look at
HOWTO: Removing unnecessary entries from the grub menu list
(a.k.a removing old kernel packages and rewriting new menu.lst)
http://kubuntuforums.net/forums/inde...opic=3082556.0

How can I protect the 2.6.20, to not be automatically removed?

Simply - don't update kernels.
Hmm - maybe Synaptic Package Manager can help you. There is option to lock packages:

To Lock a Package to the Current Version
To lock a package to the current version follow these steps:
Select the package that you want to lock in the package list.
Choose Package → Lock Version.
The Synaptic Package Manager will reload the package information. You should now see, that the menu item Package → Lock Version is checked. Furthermore all actions in the menu Package are disabled now.
To unlock the package uncheck Package → Lock Version.

Where can I download a deb of the old 2.6.20 kernel for emergency recovery?

Ubuntu packages
http://packages.ubuntu.com/
=>
Search package directories
Keyword: linux-image
Distribution:feisty
=>

Package Search Results

You have searched for packages that names contain linux-image in distribution feisty, all sections, and all architectures.

Found 47 matching packages, displaying packages 1 to 47.

=>
If you are using generic:

Package: linux-image-2.6.20-16-generic (2.6.20-16.33) [security]
Linux kernel image for version 2.6.20 on x86/x86_64

This package contains the Linux kernel image for version 2.6.20 on x86/x86_64.

Also includes the corresponding System.map file, the modules built by the packager, and scripts that try to ensure that the system is not left in an unbootable state after an update.

Supports Generic processors.

Geared toward desktop systems.

You likely do not want to install this package directly. Instead, install the linux-generic meta-package, which will ensure that upgrades work correctly, and that supporting packages are also installed.

=> Download linux-image-2.6.20-16-generic

In worst case, if I have to boot from the Feisty-Live-CD: Can you help me with the apt-get command? I assume:
apt-get install kernel-2.6.20...deb
will work on the Live-CD's RAM-Disk ... how to specify my harddrive as target?

APT HOWTO
http://www.debian.org/doc/manuals/ap.../index.en.html
or

Code:

man apt-get

To get package (in the live CD session):

Code:

sudo apt-get update
sudo apt-get -d install linux-image-2.6.20-16

-d, --download-only
Download only; package files are only retrieved, not unpacked or installed.

linux-image is at /var/cache/apt/archives. Copy it in safe place.

Installing package:

Code:

sudo dpkg - i package.deb

man dpkg:

dpkg(1) dpkg suite dpkg(1)

NAME
dpkg - package manager for Debian

SYNOPSIS
dpkg [options] action

WARNING
This manual is intended for users wishing to understand dpkg’s command
line options and package states in more detail than that provided by
dpkg --help.

It should not be used by package maintainers wishing to understand how
dpkg will install their packages. The descriptions of what dpkg does
when installing and removing packages are particularly inadequate.

DESCRIPTION
dpkg is a tool to install, build, remove and manage Debian packages.
The primary and more user-friendly front-end for dpkg is dselect(1).
dpkg itself is controlled entirely via command line parameters, which
consist of exactly one action and zero or more options. The action-
parameter tells dpkg what to do and options control the behavior of the..

ACTIONS
dpkg -i | --install package_file...

About /var/cache/apt/archives

HOWTO: Cleaning local package archives
http://kubuntuforums.net/forums/inde...opic=3082399.0

Link:
The dangers of automatic updates
http://www.linux.com/feature/119162

**private_lock** · Jan 09, 2008, 08:02 AM

Re: Kernel-Images and Updates

@Qqmike

The howmany=all is already set and I remember the older feisty kernel 2.6.20-15... being erased to allow for the newer gutsy 2.6.22... Actually in /boot I see only two pairs of files one 2.6.20-16 and one 2.6.22. So the 15 is definitely gone from my harddrive. There must be a hidden secret location where the package management knows to retain two distinct kernels. I'd like to write a three in there for the moment ;-)

@Rog131

Wow ... I got to work through all this. Hopefully on Saturday, but not right now. I'll report back on my progress.

Thanks to both of you!
private_lock

**Rog131** · Jan 09, 2008, 12:46 PM

Re: Kernel-Images and Updates

Pinning version

3.10 How to keep specific versions of packages installed (complex)
http://www.debian.org/doc/manuals/ap....en.html#s-pin

Note
Not so complex.

Example.
I'm using dolphin 0.82 and i don't want to upgrade to the 0.92.

Now:

Code:

 sudo apt-get -s upgrade

-s, --simulate, --just-print, --dry-run, --recon, --no-act
No action; perform a simulation of events that would occur but do
not actually change the system.

=>
There are three upgradeable packages:

amarok amarok-xine dolphin
Inst amarok-xine [2:1.4.7-0ubuntu3] (2:1.4.8-0ubuntu1~gutsy1 Ubuntu:7.10/gutsy-backports) []
Inst amarok [2:1.4.7-0ubuntu3] (2:1.4.8-0ubuntu1~gutsy1 Ubuntu:7.10/gutsy-backports)
Inst dolphin [0.8.2-1] (0.9.2-0ubuntu2 Ubuntu:7.10/gutsy)
Conf amarok (2:1.4.8-0ubuntu1~gutsy1 Ubuntu:7.10/gutsy-backports)
Conf amarok-xine (2:1.4.8-0ubuntu1~gutsy1 Ubuntu:7.10/gutsy-backports)
Conf dolphin (0.9.2-0ubuntu2 Ubuntu:7.10/gutsy)

But if i:
Alt + F2 : kdesudo kate /etc/apt/preferences
and put there:

Package: dolphin
Pin: version 0.8.2*
Pin-Priority: 1001

After this

Code:

sudo apt-get update

and

Code:

sudo apt-get -s upgrade

There are two upgradeable packages:

amarok amarok-xine
Inst amarok-xine [2:1.4.7-0ubuntu3] (2:1.4.8-0ubuntu1~gutsy1 Ubuntu:7.10/gutsy-backports) []
Inst amarok [2:1.4.7-0ubuntu3] (2:1.4.8-0ubuntu1~gutsy1 Ubuntu:7.10/gutsy-backports)
Conf amarok (2:1.4.8-0ubuntu1~gutsy1 Ubuntu:7.10/gutsy-backports)
Conf amarok-xine (2:1.4.8-0ubuntu1~gutsy1 Ubuntu:7.10/gutsy-backports)

**private_lock** · Jan 13, 2008, 04:16 PM

Re: Kernel-Images and Updates

@Rog131

Thank you very much! This is absolutely brilliant. I spent some time reading, downloaded the old kernel for backup. Finally I did the update. The new kernel just modified the other 22 kernel and left the version 20 untouched. The new one still isn't running, but I'm confident now, to survive any further kernel-upgrades. As long as the new one isn't running, I can always recover to the backup now.

Great and thanks a lot. You definitely saved me a lot of time to research all this information myself.
private_lock

**Snowhog** · Jan 13, 2008, 06:44 PM

Re: Kernel-Images and Updates

Thanks Rog! I've added that little tidbit of info to my repository of "Good to know stuff." And just how much more of this stuff do you have tucked away in the igloo of yours!!

**Guest** · Jan 09, 2010, 12:08 PM

Re: Kernel-Images and Updates

thanks a lot! worked perfectly with Kubuntu 9.10 with KPackageKit.

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