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Old 03-10-2003, 09:12 PM   #1
JustinHoMi
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Registered: Apr 2001
Location: Raleigh, NC
Distribution: CentOS
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"temporary" kernel?


Hey. I'm using grub on a couple of redhat 7.2 boxes. My boxes are colocated far away from me, so when a kernel install goes bad... well I'm screwed! Is there any way to automatically revert back to a different kernel? Or is there any way to set grub to only boot that kernel once (and on the next reboot it reverts back to the original config)?

Any suggestions?

Thanks!
Justin
 
Old 03-10-2003, 10:01 PM   #2
Dark_Helmet
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I'm not sure if I understand the problem. Why not just keep a copy of your old, stable kernel on the machine, and simply modify your grub.conf file to add the new test kernel? Once you're satisfied the new kernel isn't going to break you, then get rid of the old kernel.
 
Old 03-10-2003, 10:05 PM   #3
born4linux
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Registered: Sep 2002
Location: Philippines
Distribution: Slackware, RHEL&variants, AIX, SuSE
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hmm. that's quite a question u have. what i am thnking is for u to use a script that will check the kernel version after booting (by evaluating 'uname -r'). and if it is ur temporary kernel, it will then change the 'default' option in your grub.conf file to make it boot ur 'good' kernel. grub-install doesn't need to be re-run after making changes to grub.conf so the easies way i'm thinking is that you have two grub.conf files say, grub.conf.good and grub.conf.temp which ur script will copy to /boot/grub/grub.conf. 'am not good at scripting so u might ask somebody about it (check another LQ forum).

or, check the fallback option for grub. never tried using that before.
 
Old 03-11-2003, 01:30 AM   #4
JustinHoMi
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I do a lot of scripting, so that's what I was planning if all else failed.

But... there's a fallback option? I haven't seen that.... Wasn't in the man page, and I didn't find anything on the net. Does anyone else have more information on this?
 
  


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