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When I reboot my Ubuntu 10.04 nodes, I'd like to be able to see the kernel boot messages when connecting to the IPMI interfaces using Serial Over LAN mode (ttyS0). What do I need to do to be able to redirect these messages to ttyS0?

Ideally, I'd like them to also still appear in the usual place (tty0, I think) for when I plug a monitor directly into the box.

2 Answers 2

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After doing some research, apparently you need to edit the /etc/default/grub file and add the following line:

GRUB_CMDLINE_LINUX="console=tty0 console=ttyS0"

Then run the update-grub command which will update /boot/grub/grub.cfg accordingly.

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It has been a long time since I did this but this might work.

Edit /etc/grub.conf and add the following to your kernel line

console=tty0 console=ttyS0

If that does not work you might need to make a special boot option for just serial and put the ttyS0 first and use the example as your monitor boot option

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  • I think the grub stuff is in a different place in ubuntu, there's no /etc/grub.conf file. May 14, 2010 at 2:25
  • chances are its in /etc/grub/grub.conf then
    – Mike
    May 14, 2010 at 12:18
  • 1
    /boot/grub on Ubuntu Jun 23, 2010 at 0:37

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