In article <20141215113303.E0AE4A00424 at mail.centos.org>, Rushton Martin <JMRUSHTON at 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: > > http://www.gnu.org/software/grub/manual/legacy/grub.html Excellent - just what I was looking for. Thanks! Tony > >-----Original Message----- > >From: centos-bounces at centos.org [mailto:centos-bounces at centos.org] On > >Behalf Of Tony Mountifield > >Sent: 15 December 2014 11:01 > >To: centos at 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 -- Tony Mountifield Work: tony at softins.co.uk - http://www.softins.co.uk Play: tony at mountifield.org - http://tony.mountifield.org