going back to a previous kernel

[Nigel Henry]

On Monday 14 May 2007 04:30, Scott Berry wrote:
> Hi Nigel,
>
> Two more questions for you.
>
> 1.  How would one add repositories to apt?  I have quite a few I would like
> to add.

These are the 2 that I have in /etc/apt/sources.list in FC6.

# Add any local / 3rd party repositories here..

rpm http://ayo.freshrpms.net fedora/linux/6/i386 freshrpms

rpm http://macromedia.mplug.org/ rpm macromedia

They are set out differently to the ones for the Fedora repositories, as the 
Fedora repositories are using a later version of Apt, which uses repo 
metadata, so you see an entry like this for the Fedora repo's.

# Fedora Core 
repomd http://download.fedora.redhat.com/pub/ 
fedora/linux/core/$(VERSION)/$(ARCH)/os/

Basically though, if you go to the site of a third part repo, there are 
instructions there for adding the repo to your apt sources.list. Sometimes 
you might have to add the necessary line to /etc/apt/sources.list manually, 
on other sites you can just click on a link, and the repo will be added to 
your /etc/apt/sources.list.

Either way you also need to download and import the GPG keys for the 
repositories, so that the packages you want to download can be verified.

I normally create a directory named "keys" in my /home/user directory, and 
download them to that location. Then cd to the keys directory on the CLI, su 
to root, and run. rpm --import <keyname>.

You need to be a bit carefull about having too many third party repositories 
enabled when doing an apt-get update. You can get some nasty package 
conflicts when subsequently doing an apt-get dist-upgrade.


>
> 2.  How do I exclude kernels from being updated?

Not sure about this using Apt, as I always let the kernel updates go ahead. 
But I can see the kernels on the Grub menu, and you can't. No text to speech 
at this stage. I'll post the question to Panu at   
apt-rpm at lists.laiskiainen.org

Perhaps he will have a suggestion.

Nigel.

Btw. I apologise if you don't understand some of what I've said. I'm sighted, 
but find it difficult explaining something that I can see, to someone who is 
blind. Perhaps I should just speak to you, just like I would with a sighted 
person, perhaps leaving out the GUI stuff. 


>
> Scott
> ----- Original Message -----
> From: "Nigel Henry" <cave.dnb at tiscali.fr>
> To: <fedora-list at redhat.com>
> Sent: Sunday, May 13, 2007 4:26 PM
> Subject: Re: going back to a previous kernel
>
> > On Sunday 13 May 2007 21:21, Scott Berry wrote:
> >> Hello there,
> >>
> >> How do you go back to a previous kernel?  I read something about grub on
> >> the dektop but I don't remember where that is.
> >>
> >> Scott
> >
> > Hi Scott. You will find the grub config file, as root on the CLI,
> > at /boot/grub/grub.conf.
> >
> > There are a couple of lines you can make changes to. One is named
> > "hiddenmenu" . Put a # at the start of the line, and when you boot up,
> > Grubs
> > menu will be shown, showing you all available kernels. Also you can
> > change the "timeout" line. changing this from 5 to 30 will give you more
> > time to choose which kernel you want to boot.
> >
> > If you are using Apt for getting updates to the system, apt-get update,
> > followed by apt-get dist-upgrade, all kernels will be saved to Grubs
> > menu.
> >
> > If you are using Yum, it only saves as default, the 2 latest kernels. You
> > can
> > change this behaviour by editing /etc/yum/pluginconf.d/installonlyn.conf
> > . Just change the line "enabled=1" to "enabled=0" . This will disable the
> > plugin, and subsequent kernel updates will all be saved to Grubs config
> > file,
> > and will show up on Grubs menu.
> >
> > All the best.
> >
> > Nigel.
> >
> >
> >
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