On 01/03/2017 09:09 AM, Chris Murphy wrote:
On Tue, Jan 3, 2017 at 8:06 AM, Michael Eager <eager@xxxxxxxxxxxx> wrote:
The Fedora 23 installation on my laptop will not boot. grub.cfg
is missing, for some reason.
That's unusual. How do you know it's missing, and where is it normally located?
It should be under /boot/grub2. I found out that it was missing by booting,
receiving a bare "grub>" prompt with nothing else, and spending time
doing web searches, learning way too much about EFI, and scratching my
head 'till my hair hurt. The grub directory is there, with grubenv and
themes, but no conf file.
No idea how grub.conf could have been deleted. I copied a couple large
directories from a server to the laptop (obviously not to /boot and not
as root) and then shut down. Next boot, no grub.conf.
I don't have a backup and trying to
rebuild grub.cfg seemed a bit problematic. (I'm able to awkwardly
boot into a Ubuntu install on the laptop and I have a bit of concern
that running grub-install will end up breaking that.)
Create a USB stick using any Fedora netinstaller, boot and choose the
Troubleshooting menu, and in that submenu is an option to Rescue a
Fedora system. Choose that. There will be an option to locate and
assemble Fedora, do that. And then at the shell:
# chroot
what's next depends on whether you have UEFI or BIOS firmware:
Reinstalling GRUB itself
https://docs.fedoraproject.org/en-US/Fedora/25/html/System_Administrators_Guide/sec-Reinstalling_GRUB_2.html
https://docs.fedoraproject.org/en-US/Fedora/25/html/System_Administrators_Guide/sec-grub2-reinstall_on_UEFI-Based_Machines.html
Rebuilding grub.cfg is in step 4 here, pick one of the two commands
listed, depending on firmware type.
https://docs.fedoraproject.org/en-US/Fedora/25/html/System_Administrators_Guide/sec-Resetting_and_Reinstalling_GRUB_2.html
You can do this with any Fedora netinstaller. The version doesn't matter.
Thanks.
I wanted to repair/upgrade the F23 install with F25. Booting the
Live DVD, there isn't an option to repair/upgrade an existing
install, and when I try to do a new install, the installer will
not let me install over the existing F23 root. (When I select the
old root partition as /, it will not add it to the new install
partitions.)
The install requires the partition used for root fs to be reformatted.
Basically they want a completely clean file system before starting an
installation. The partial exception is Btrfs, which doesn't need
reformatting, but will require a new subvolume created for the new
root fs. The installer will do that automatically.
OK. I'll try this again. It didn't work before.
The Fedora documentation that I find says that the Live CD/DVD does
not support doing an upgrade, I need to use a bootable DVD.
I don't think any media supports upgrades anymore. Which documentation
says this?
Not sure any more. I tried to make sure I wasn't looking at old docs.
The
documentation says that an existing install will be automatically
recognized when it is booted. I'm not able to find a complete
bootable image for Fedora 25 Workstation. When I found the spins
of Fedora 25, each seems to be a Live image, not bootable.
I don't understand what the distinction is.
Q: Is a complete bootable Fedora 25 Workstation image available?
There's a net install image, and there's a Live image. That's it.
Q: Is the Fedora 25 Server image a complete bootable DVD including
KDE?
No, it's neither KDE nor GNOME. It's a specific Fedora Server product,
and uses Cockpit accessed via web browser, for its GUI.
Q: Is there a way to tell the Live installer to upgrade/replace
an existing installation?
Replace, yes. You'll need to specify which partitions to reformat or
delete. Probably a good bet you don't want to delete or reformat /home
Q: Is there another path to upgrading a damaged installation?
No, you have to fix it before it can be upgraded.
Thanks.
--
Michael Eager eager@xxxxxxxxxxxx
1960 Park Blvd., Palo Alto, CA 94306 650-325-8077
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