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change initramfs by hand?

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Operating Systems Linux Debian change initramfs by hand?
# 8  
Old 12-16-2008
Ohhhh. that might be a problem. Is there a /etc/grub.conf or is it just a soft-link to /etc/grub/grub.conf??
# 9  
Old 12-16-2008
Quote:
Originally Posted by otheus
Is there a /etc/grub.conf or is it just a soft-link to /etc/grub/grub.conf??
Neither. There's no file grub.conf anywhere in the /etc or /boot trees.
That's probably OK since it's true for all my machines, and most of them work fine. The web site Debian - GRUB Wiki tells me that for Debian (which I use) the files is called /boot/grub/menu.lst . Makes sense to me, since as far as I understand everything outside /boot is invisible during the boot process.

Are you sure that's where the error is? As I said grub does its job (I can see the line "initrd /initrd.img" ), and the boot process hangs about 10 seconds later.
# 10  
Old 12-17-2008
To my knowledge, the grub file MUST specify the initrd and root options to the kernel. Otherwise, things fail. Let me poll some others on this.
# 11  
Old 12-17-2008
Quote:
Originally Posted by otheus
To my knowledge, the grub file MUST specify the initrd and root options to the kernel.
I am sure it must. It does, too. What I said is that I set up the names on symbolic links in the /boot filesystem so that the old filenames will point to the new files. Hence the old grub file can load the new initrd without me changing grubs config.
# 12  
Old 12-17-2008
What we mean is that the CONTENTS of the grub configuration file MUST have a line like:
Code:
  kernel /vmlinuz-xxxx-xxx.xx root=/dev/sda3
  initrd=/someinitrd.img.gz

The REAL someinitrd.img.gz MUST exist IN the same partition as grub. Softlinks will work IF the real file is still in the same partition.
# 13  
Old 12-17-2008
menu.lst is correct, that should contain what otheus was requesting...

I would be interested in seeing that file myself.

Your previous post...

Quote:
Failed to execute /init
Kernel panic - not syncing: No init found. Try passing init= option to kernel.
seems to say that your menu.lst points to an incorrect imitrd.img.

For instance my menu.lst says:

Code:
default=1
timeout=5
splashimage=(hd0,0)/grub/splash.xpm.gz
hiddenmenu
title Red Hat Enterprise Linux ES (2.6.9-5.0.3.EL)
        root (hd0,0)
        kernel /vmlinuz-2.6.9-5.0.3.EL ro root=LABEL=/ rhgb quiet
        initrd /initrd-2.6.9-5.0.3.EL.img
title Red Hat Enterprise Linux ES (2.6.9-5.0.3.ELsmp)
        root (hd0,0)
        kernel /vmlinuz-2.6.9-5.0.3.ELsmp ro root=LABEL=/
        initrd /initrd-2.6.9-5.0.3.ELsmp.img
title Red Hat Enterprise Linux ES (2.6.9-5.ELsmp)
        root (hd0,0)
        kernel /vmlinuz-2.6.9-5.ELsmp ro root=LABEL=/ rhgb quiet
        initrd /initrd-2.6.9-5.ELsmp.img
title Red Hat Enterprise Linux ES-up (2.6.9-5.EL)
        root (hd0,0)
        kernel /vmlinuz-2.6.9-5.EL ro root=LABEL=/ rhgb quiet
        initrd /initrd-2.6.9-5.EL.img

notice that the last line (for reading sake) says "initrd /initrd-2.6.9-5.EL.img" and my "initrd-2.6.9-5.EL.img" file is located in "/boot/initrd-2.6.9-5.EL.img".

Code:
# ls -l /boot/initrd-2.6.9-5.EL.img
-rw-rw-r--  1 root root 489486 Mar  9  2005 /boot/initrd-2.6.9-5.EL.img

# 14  
Old 12-17-2008
Quote:
Originally Posted by otheus
What we mean is that the CONTENTS of the grub configuration file MUST have a line like:
Code:
  kernel /vmlinuz-xxxx-xxx.xx root=/dev/sda3
  initrd=/someinitrd.img.gz

Yes it does. See below.

Quote:
Originally Posted by otheus
The REAL someinitrd.img.gz MUST exist IN the same partition as grub. Softlinks will work IF the real file is still in the same partition.
Yes, that's the case.

Here's the menu.lst (without comments):
Code:
default         0
timeout         5

title           Debian GNU/Linux, kernel 2.6.26-1-686 Default
root            (hd0,0)
kernel          /vmlinuz root=/dev/mapper/rootfs ro\n")
initrd          /initrd.img

title           Debian GNU/Linux, kernel 2.6.26-1-686 Default (single-user mode)
root            (hd0,0)
kernel          /vmlinuz root=/dev/mapper/rootfs ro\n") single
initrd          /initrd.img

title           Debian GNU/Linux, kernel 2.6.26-1-686
root            (hd0,0)
kernel          /vmlinuz-2.6.26-1-686 root=/dev/mapper/rootfs ro\n")
initrd          /initrd.img-2.6.26-1-686

title           Debian GNU/Linux, kernel 2.6.26-1-686 (single-user mode)
root            (hd0,0)
kernel          /vmlinuz-2.6.26-1-686 root=/dev/mapper/rootfs ro\n") single
initrd          /initrd.img-2.6.26-1-686
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