Need to boot from CD and delete a file on the hard drive

Micah micahjon at
Tue Oct 25 12:00:31 PDT 2005

Maude User wrote:
> Hello All --
> I changed a configuration file and now I can no longer boot from my hard drive (but I can still 
>  boot from the CD). I would like to boot from the CD and undo my change to the configuration 
> file -- but when I boot from the CD it automatically launches the install program. Is there a way
>  to boot from the boot CD and get a shell and make a change to a file on the hard drive? (I got 
> an "emergency shell" after booting from the CD -- but I can't figure out how to access my hard 
> drive filesystem from it.)
> I was trying to set up a serial console using the instructions here:
> I typed the following at the prompt:
> # echo 'console="comconsole"' >> /boot/loader.conf
> then unplugged my regular keyboard and tried to reboot -- but the machine now freezes on 
> bootup.
> I now want to boot from a CD and remove the file /boot/loader.conf from the hard drive. Then I 
> should be able to boot normally again from the hard drive.
> I went into the BIOS and booted from the CD and this put me in the install program. I don't 
> want to install everything again -- I just want to boot up from the CD and execute the following 
> command at the prompt:
> # rm /boot/loader.conf
> After booting from the CD, I found a command in the install program to enter an "emergency 
> shell" and accessed this shell by hitting ALT-F4 -- but if I do an "rm" command in this 
> emergency shell, it doesn't apply to the filesystem on the hard drive -- it applies to the CD. I 
> need to delete the file /boot/loader.conf while booting from the CD.
> Is there any way to fix this without installing FreeBSD all over again?
> Thanks.
> Scott Alexander

The option you are looking for is "fixit" from the install disk menu. 
This'll get you a command prompt.  You will have to manually mount the 
partion that boot is on then you can delete, rename, edit, etc the file 
in question.


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