In article 20141215113303.E0AE4A00424@mail.centos.org, Rushton Martin JMRUSHTON@qinetiq.com wrote:
If you are using GRUB 0.97 (legacy GRUB), then this capability is provided by the "default saved" and "fallback" commands. See sections 4.3.1 and 4.3.2 in the manual:
Excellent - just what I was looking for. Thanks!
Tony
-----Original Message----- From: centos-bounces@centos.org [mailto:centos-bounces@centos.org] On Behalf Of Tony Mountifield Sent: 15 December 2014 11:01 To: centos@centos.org Subject: [CentOS] One-time reboot into alternate kernel?
Apologies if this should be well-known, but I couldn't find anything!
Situation: a system in a remote location, with no KVM, IPMI or iLO, and therefore no console access, only ssh. Multiple kernels listed in grub.conf.
Is there a way to reboot temporarily into one of the other kernels listed in grub.conf, without changing the default= line, so that a subsequent reboot will default back to the original kernel?
The problem I have is that having changed the default= line to select a kernel that doesn't boot properly, I need to have someone visit the console in order manually to select the working kernel again. I would like to avoid that situation if possible.
Thanks, Tony