On 06/09/2014 12:52 PM, SilverTip257 wrote: > On Mon, Jun 9, 2014 at 12:45 PM, <m.roth at 5-cent.us> wrote: > >> James B. Byrne wrote: >>> On Mon, June 9, 2014 11:46, Steve Clark wrote: >> <snip> >>> implementation as it necessarily involves a restart of the test system. >> I >>> am trying to discover if there is some way of restarting a headless >> server >>> and use a specific grub entry instead of the default. I want to leave >> the >>> default unchanged until I can prove that any manual changes I make do not >>> negatively impact a system restart. >>> >>> If anyone knows if this is possible and if so, how it is done, I would >>> welcome the information. > If you happen to be fortunate enough and have (ipmi v2) Serial over LAN > configured, you can reboot and change the boot selection. > > >> That's a no-brainer: change the default= line in grub from 0 to whatever >> > Not really. > James wrote that he does not want to "negatively impact a system restart". > If I was in his shoes, I wouldn't change the grub default boot item > without serial-over-lan access, a KVM switch with network access, or > "remote hands" on site. Otherwise you just changed your default boot item > and it could cyclically crash and (possibly) reboot. > > >> the entry number is. Note that I'm not sure what happens if you add a >> kernel update in there, whether the post-install scripts will increment >> the number so as to continue to point to the correct kernel. >> >> This show how to do a one time boot and then the next time boot the original system https://www.gnu.org/software/grub/manual/legacy/Booting-once_002donly.html -- Stephen Clark *NetWolves Managed Services, LLC.* Director of Technology Phone: 813-579-3200 Fax: 813-882-0209 Email: steve.clark at netwolves.com http://www.netwolves.com