Kernel Crash? While trying to Update

Entheos · 09-30-2006, 06:15 PM

:/ well I tried to update Slackware 10.2 because the kernel it came with was too old and I messed up somehow everytime I boot to Linux it tries to load and it freezes,this happened a few months ago, I tried to fix it but I didn't have time to do research because school started and I barely have time to do anything on the computer or cut my hair

sorry for the undetailed information but is there anyway to "rollback" to the old kernel because I got some important files in linux that im trying to get to but have no idea on how to get to it thank you for anybody that could help or tries.

comprookie2000 · 09-30-2006, 06:35 PM

The other kernel should still be there. How did you install the new one?

Entheos · 09-30-2006, 09:27 PM

I didn't delete the old kernel but I replaced vmlinux shortcut towards the new kernel

comprookie2000 · 09-30-2006, 10:11 PM

OK, You may need to add it back to lilo.conf
1) Boot from the Slack install CD.
2) Press Ctrl&Alt&F2 to switch to a
terminal.
3) You may need to press enter to enable it.
4) You should now have a root prompt. Make a
directory for a mountpoint:
# mkdir /mnt/slack
5) Mount your root file system there:
# mount /dev/hdx /mnt/slack (whatever the root is)
6) You can now change your root to this,
effectively changing the system from the
setup to the installed OS:
# chroot /mnt/slack
7) Now check out the following:
cd /mnt/slack/boot
ls
The old kernel may have used and initrd so be sure to add that to lilo conf.
pico -w /mnt/slack/etc/lilo.conf
then edit as needed and use whatever editor you like.
make sure to rerun lilo
lilo
exit
umount /mnt/slack
reboot
something like that ...

davidsrsb · 10-01-2006, 04:00 AM

You need a live cd to get back in. The Slackware disk 2 from v9.x? used to do this but since at least v10 did not. Slax works.
I suspect that you forgot to run lilo after updating the kernel or forgot to update the modules package.

Eternal_Newbie · 10-01-2006, 07:08 AM

In 10, 10.1 and 10.2 you use the FIRST disk (the boot disk). You don't have to use SLAX.

Also if you didn't overwrite your modules you can boot your installation from the boot disc by entering this at the first prompt (where it asks for the kernel):

mount root=/dev/hda1

replace hda1 with your root partition.

Then edit lilo.conf and rerun lilo following comprookie2000's instructions above.

EDIT checked FAQ.TXT and don't need ro at end of boot line

Entheos · 10-01-2006, 08:18 AM

Thanks for y'all help, I appreciated it, I'll come back to say it worked, :\ well thats if it works I HOPE

Entheos · 10-01-2006, 06:34 PM

ok guys this is what I did

I put my first cd of slack in, it runs...
I press Ctrl+Alt+F2 press Enter to no avial I still get into boot:...so I was like w/e
I Put: Sata.i root=/dev/sda2
login as "root"
mkdir /mnt/slack
mount /dev/sda2 /mnt/slack
chroot /mnt/slack ,works but heres the problem..
cd /mnt/slack/boot
No such directory found?
I was like w/e let me try the next step
pico -w /mnt/slack/etc/lilo.conf I get into it but its empty?

anyways reaccessing my memory from 3 months ago since I'm doing all of this for linux once agian is refreshing my memory

, I remember I made a noobish mistake, I edited both initd and vmlinux to accommodate the new kernel, but never deleted the old kernel file, its directory and folders. is there anyway I could revert initd (w/e u call the file) back to its orginal form before I edited it, hope this helps before going back to school I was reading upon a file (can't remember if I was dreaming or not

) that said something about the function |more |less which would revert it back (maybe I got the wrong function)...sorry guys I just need to get to those darn files that I left in Linux they are irreplacable

Entheos · 10-02-2006, 10:06 PM

anyone?...............

311Sam · 10-02-2006, 11:28 PM

you could try downlolading "damn small linux", its a live cd. then you could edit lilo with it

drumz · 10-02-2006, 11:38 PM

After chroot /mnt/slack, then you would do
cd /boot
chroot does what it says: changes the root. Thus what was previously in /mnt/slack/boot is now in /boot.

Entheos · 02-04-2007, 11:09 AM

Sorry for resurrecting this thing again but I could get through the whole process up until I get to lilo.conf don't know what to change lol, I need to put 10.2 back to its original kernel or is there any alternative ways of retrieving files fromm this crashed kernel

sorry mates but those files are a life work for me I should've never messed with the kernel in the first place/

H_TeXMeX_H · 02-04-2007, 12:21 PM

Dude, use a live CD to get or change whatever you need on the disk. Use slax or DSL or knoppix or even the 1'st CD/DVD of Slackware.

Once you boot with that, mount your HDD and do whatever in there.

Code:

mount /dev/hda /mnt/tmp
cd /mnt/tmp  
ls # and here are you files

What filesystem you got on there ? If it's ext2 or ext3 then you'll be able to mount it with any live CD, if not then you'll need one with a kernel that supports it.

Entheos · 02-14-2007, 03:52 PM

Okay since now I got no time in my hands lol

I did my research every time I

Code:

pico -w /mnt/slack/etc/lilo.conf

lilo seems to crash anyways Im just going to reisnatll the kernel using the cd by using

Code:

cp /mnt/cdrom/kernels/sata.i/config /usr/src/linux/.config

but for some reason when I /mnt/cdrom slackware doesn't recognize my mount?! I got two cdroms one is my bruner thats my master and the cd-rom thats my slave where do I have my cd mounted on?

lol I figured it out its my cd is on hda

screw this imma make a new thread