Web Hosting Talk : Web Hosting Main Forums : Hosting Security and Technology : Grub on Centos

[gbjbaanb]

Hi all.

I have a question regarding grub, on Centos 4.3, mainly Its time to rebuild my kernel only this time my server is far away in the DC. I have heard that grub 0.95 does not support the "reboot once with the specified kernel" option, this support was added in 0.96.

Can anyone confirm this for me?

[ACENET-Jason]

Yes you would need 0.96 to support that functionality. The only way around it is to make a patch, which I would not recommend unless you have detailed knowledge on grub.

[gbjbaanb]

I have upgraded grub to 0.97 on my 32bit server, but there is no 64-bit support Installing is very easy though, forget about patching 32-bit systems.

[morcego]

In theory, it is supposed to support. On the specfile you will find:
# add support for lilo -R-esque select a new os to boot into
Patch101: grub-0.93-once.patch

I haven't tried yet, but it is supposed to be possible to do it with the savedefault command on the grub shell, using the --once option.

That a look at this thread, it should give you pointers:
http://lists.alioth.debian.org/piper...ne/000223.html

[eth00]

I am pretty sure that it is built in just the version numbers are not backported like everything else RH does, much like the kernels. I have never had trouble on any RHEL4/CentOS4 servers with bootonce. Did you actually try the parameter, even if it is to boot to an old known-good kernel, or are you just guessing it is not there because of version numbers?