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Old 03-17-2012, 06:58 AM   #1
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Booting to a single user mode from iLOM


My Redhat server went down, and I am trying to get it up.
I have only now a connection to it through its iLOM.
I am trying to start the console from it, but always stops at WebSphere
start application.
I want to just get the server up and may see the problem of this after, so I want to get to the single user mode and may try to avoid starting this application at the boot part.
I read that I can do that from the Grub, but I don't know how to reach to it from the iLOM.
I have Sun(TM) Integrated Lights Out Manager Version

Old 03-17-2012, 11:55 PM   #2
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Location: D.i.t.h.o, Texas
Distribution: Slackware 13.x, rhel3/5, Solaris 8-10(sparc), HP-UX 11.x (pa-risc)
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How to boot the OS into single-user mode depends on if this is a SPARC or x86 based Sun server. Do you know the model name?

How to Use GRUB to get to Single-User Mode (Assumes x86)
1) Power-on the server from the LOM.
2) Get to the console (the LOM command 'console' should work)
3) You should see a GRUB screen asking which kernel to boot, leave it at the default, but press the 'e' key.
4) Look for a line like this (see below), add ' S' to the end of the line.
kernel / ro root=/dev/vg/rot rhgb quiet
5) Press 'b' to boot, should go right to Single-User Mode (might prompt for the root password)

Example: See this blog post.
Old 03-18-2012, 01:14 AM   #3
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It is x86 running red hat.
When I try to start the console, I can't see any grub menu.
I can only see (press CTRL+S to get setup menu), Is there a way to see the grub menu?



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