Configuring boot loader

fbarsoba · 04-17-2006, 10:12 PM

Hi,

I have been able to compile the new kernel.. I still have a question.. The README says that I have to put the bzImage on the boot folder and then change the grub.conf file... i have doubts regarding how to inform grub.conf about the new kernel (i want to have both of them) My current grub.conf looks like this:

Code:

# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE:  You have a /boot partition.  This means that
#          all kernel and initrd paths are relative to /boot/, eg.
#          root (hd0,2)
#          kernel /vmlinuz-version ro root=/dev/VolGroup00/LogVol00
#          initrd /initrd-version.img
#boot=/dev/hda
default=0
timeout=5
splashimage=(hd0,2)/grub/splash.xpm.gz
hiddenmenu
title Windows XP
	rootnoverify (hd0,1)
	chainloader +1
title Fedora Core (2.6.15-1.2054_FC5)
	root (hd0,2)
	kernel /vmlinuz-2.6.15-1.2054_FC5 ro root=/dev/VolGroup00/LogVol00 rhgb quiet
	initrd /initrd-2.6.15-1.2054_FC5.img

So, i guess i need a new entry. The kernel already in grub.conf makes reference to /vmlinuz and /initrd, which can be located in: (these are my current kernel files)

Code:

[root@localhost boot]# pwd
/boot
[root@localhost boot]# ls -l
total 4496
-rw-r--r-- 1 root root   56972 Mar 14 16:00 config-2.6.15-1.2054_FC5
drwxr-xr-x 2 root root    1024 Apr 17 22:57 grub
-rw-r--r-- 1 root root 1775671 Mar 27 23:06 initrd-2.6.15-1.2054_FC5.img
drwx------ 2 root root   12288 Mar 27 17:45 lost+found
-rw-r--r-- 1 root root 1050591 Mar 14 16:00 System.map-2.6.15-1.2054_FC5
-rw-r--r-- 1 root root 1677922 Mar 14 16:00 vmlinuz-2.6.15-1.2054_FC5

Still, the README says that i have to put the image bzImage in this folder... How do I reference it then? How is my grub.conf going to look like eventually?

Here's my new kernels' boot folder:

Code:

[root@localhost boot]# pwd
/usr/src/linux/arch/x86_64/boot
[root@localhost boot]# ls -l
total 3500
-rwxr-xr-x 1 root root     512 Apr 17 22:39 bootsect
-rw-r--r-- 1 root root    2040 Apr 17 22:39 bootsect.o
-rw-rw-rw- 1 root root    2156 Apr 17 17:53 bootsect.S
-rw-r--r-- 1 root root 1698016 Apr 17 22:39 bzImage
drwxrwxrwx 2 root root    4096 Apr 17 22:39 compressed
-rw-rw-rw- 1 root root      47 Apr 17 17:53 install.sh
-rw-rw-rw- 1 root root    3707 Apr 17 17:53 Makefile
-rw-rw-rw- 1 root root     330 Apr 17 17:53 mtools.conf.in
-rwxr-xr-x 1 root root    7226 Apr 17 22:39 setup
-rw-r--r-- 1 root root   18696 Apr 17 22:39 setup.o
-rw-rw-rw- 1 root root   22422 Apr 17 17:53 setup.S
drwxrwxrwx 2 root root    4096 Apr 17 22:39 tools
-rw-rw-rw- 1 root root   40381 Apr 17 17:53 video.S
-rwxr-xr-x 1 root root 1689824 Apr 17 22:39 vmlinux.bin

tnx,
Fernando

archtoad6 · 04-18-2006, 05:41 AM

Warning: I haven't (yet) had to compile & install a new kernel, BUT I work w/ GRUB & its menu.lst (grub.conf)

From their sizes in the listing of your new kernels' boot folder, I would guess that bzImage is your new initrd & vmlinux.bin is your new vmlinuz. You should verify this.

You also need an appropriate designator for your new kernel, similar to the "2.6.15-1.2054_FC5" used by existing one. I am going to refer to this as <new_kernel>.

I think the following will do what you need:

Code:

NEW=<new_kernel>
NEW_BOOT=/usr/src/linux/arch/x86_64/boot
cp  $NEW_BOOT/bzImage      /boot/initrd-$NEW.img
cp  $NEW_BOOT/vmlinux.bin  /boot/vmlinuz-$NEW

cp /boot/grub/grub.conf /boot/grub/grub.conf.000
cat  << EoF  >> /boot/grub/grub.conf

title Fedora Core ($NEW)
        root (hd0,2)
        kernel /vmlinuz-$NEW ro root=/dev/VolGroup00/LogVol00 rhgb quiet
        initrd /initrd-$NEW.img
EoF