grub / CentOS Linux kernel questions

jvsrvcs · Post by **jvsrvcs** » 2011/08/12 16:16:33

Question 1)
I did a #grub-install /dev/sda

and now it boots to a default kernel, but when I press the space bar, I get two options.

CentOS Linux 2.6.32-71.29.1.el6_x86-64
CentOS Linux 2.6.32-71.el6_x86-64

What makes the "29.1" more special than the "" non "29.1"?

Why would I need or want to use #2?

---

Question 2) With this version of grub (0.97), how do I configure to boot my Windows 7 disk (on sdb)?

I have asked on the grub mailing list and the answser is that grub 1 (0.97) is not supported on the list, only 0.98 and higher (grub2)

Regards,

J.V.

markkuk · Post by **markkuk** » 2011/08/12 16:26:48

1. 2.6.32-71 is the original version installed from CentOS 6.0 media, 2.6.32-71.29.1 is an updated version.
2. Legacy GRUB documentation is on the Web at http://www.gnu.org/software/grub/manual/legacy/ or you can read it on your CentOS machine with the command "info grub".

Post by **TrevorH** » 2011/08/12 18:29:37

[quote]
Why would I need or want to use #2?
[/quote]

You get more than one kernel because it's such an important part of the operating system that if the newly installed one does not work, then you have the option of booting the old - and hopefully still working - one that you had before.

jvsrvcs · Post by **jvsrvcs** » 2011/08/13 00:53:27

Thanks for the help. So at some point I updated something? I do not remember specifically updating the kernel, but I did do a #yum update.

Would that have put the new kernel on?

thanks

J.V.

Post by **TrevorH** » 2011/08/13 01:22:09

[quote]
Would that have put the new kernel on?
[/quote]

Yes

CentOS