Re: Questions on grub2 kernel options.
On 9 Dec 2020 at 8:28, stan via users wrote:
Date sent: Wed, 9 Dec 2020 08:28:19 -0700
To: users(a)lists.fedoraproject.org
Subject: Re: Questions on grub2 kernel options.
Organization: zohofree
Send reply to: Community support for Fedora users
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From: stan via users <users(a)lists.fedoraproject.org>
Copies to: stan <upaitag(a)zoho.com>
On Wed, 09 Dec 2020 17:42:32 +1000
"Michael D. Setzer II" <msetzerii(a)gmail.com> wrote:
> Noticed that my rescue kernels on one machine were actually a couple
> years old. Machine had been upgraded a couple times using dnf.
>
> Moved the rescue files to another locations, and thought the system
> was suppose to automatically rebuild new ones, but that didn't
> happen..
You can delete the rescue kernel and initramfs, and then run the
following command, in /boot, replacing the kernel versions with the
kernel in your /boot that you want to make the rescue kernel from.
/etc/kernel/postinst.d/51-dracut-rescue-postinst.sh 5.9.1-300.20201025.fc31.x86_64
/boot/vmlinuz-5.9.1-300.20201025.fc31.x86_64
You are correct that removing the old rescue kernel and initramfs
should recreate new ones, but it happens at the next kernel update.
So, you could do it just before a new kernel is going to be installed,
and it will happen during install.
Noticed something interesting.
the entry for rescue kernel is not updated in /boot/loader/entries
-rw-r--r--. 1 root root 392 Nov 30 2019
189711f94e78436d9618b891a8fce70e-0-rescue.conf
Has this in it, but is version 32 not 30 any longer??
title Fedora (0-rescue-189711f94e78436d9618b891a8fce70e) 30
(Workstation Edition)
version 0-rescue-189711f94e78436d9618b891a8fce70e
linux /vmlinuz-0-rescue-189711f94e78436d9618b891a8fce70e
initrd /initramfs-0-rescue-189711f94e78436d9618b891a8fce70e.img
options $kernelopts
id fedora-0-0-rescue-189711f94e78436d9618b891a8fce70e
grub_users $grub_users
grub_arg --unrestricted
grub_class kernel
Don't know if this is with the new-kernel-pkg message that it can't find a
theme. Strange didn't find that in that file, so message must come from
somewhere else.
Tried moving it, to see if it would be recreated if it was missing, but
neither building a new rescue kernel or running grub2-mkconfig created
a new one. So, put back the old one. Seems the names are the same.
Didn't try booting it..
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+------------------------------------------------------------+
Michael D. Setzer II - Computer Science Instructor (Retired)
mailto:mikes@guam.net
mailto:msetzerii@gmail.com
Guam - Where America's Day Begins
G4L Disk Imaging Project maintainer
http://sourceforge.net/projects/g4l/
+------------------------------------------------------------+