[Centos] Changing booted Kernel with grub

Mike Kercher mike at CamaroSS.net
Tue Jan 25 04:45:59 UTC 2005


Wayne Bastow wrote:
> Hi,
> 
> I have updated the kernel to 2.4.21-27.0.2 on Centos 3.4 (was 3.3
> when I did the kernel update) and have modified grub.conf to use the
> single CPU kernel:  
> 
> # 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 (hd0,0) #          kernel /vmlinuz-version ro
> root=/dev/cciss/c0d0p6 #          initrd /initrd-version.img
> #boot=/dev/cciss/c0d0
> default=1
> timeout=10
> splashimage=(hd0,0)/grub/splash.xpm.gz
> title CentOS (2.4.21-27.0.2.EL)
>         root (hd0,0)
>         kernel /vmlinuz-2.4.21-27.0.2.EL ro root=LABEL=/
>         initrd /initrd-2.4.21-27.0.2.EL.img title CentOS
>         (2.4.21-27.0.2.ELsmp) root (hd0,0)
>         kernel /vmlinuz-2.4.21-27.0.2.ELsmp ro root=LABEL=/
>         initrd /initrd-2.4.21-27.0.2.ELsmp.img title CentOS
> (2.4.21-27.0.1.EL) ....... 
> 
> I then created a new symbolic link for Sytem.map in /boot to point to
> System.map-2.4.21-27.0.2.EL. 
> 
> When I reboot the 2.4.21-27.0.1.ELsmp is used and System.map has been
> changed to point to the smp kernel. 
> 
> Is there a step I'm missing out?
> 
> BTW, the upgrade from 3.3 to 3.4 using yum seems to have worked - I'm
> running Oracle on the server. 
> 
> Thanks,
> Wayne
> _______________________________________________
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> CentOS at caosity.org
> http://lists.caosity.org/mailman/listinfo/centos

Perhaps you need:

default=1

You only pasted one entry from your grub.conf.  Do you have more entries?

Mike




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