Re: Regarding FreeBSD Custom Kernel

From: Benjamin Sobotta (mayday_at_gmx.net)
Date: 07/16/04

  • Next message: bsd hack: "Re: Regarding FreeBSD Custom Kernel" 
    To: bsd hack <time_to_hack@yahoo.com>
Date: Fri, 16 Jul 2004 19:38:31 +0000

    On Friday 16 July 2004 16:12, bsd hack wrote:
    > Hi All,
    > I have a few basic questions regarding building a custom Kernel:
    >
    > (1) Once I configure, make and make install the custom kernel... it will
    > get written to /boot/kernel. Now I have already made a backup of the
    > working kernel. what I need to know is when I get the boot loader
    > menu(when it counts from 1 to 10) is there any way in which I can Include
    > another option for my Custom Kernel. I want the default to remain as the
    > working kernel... and I want an option for my Custom kernel in the menu...

    No need to make a backup. The previous is automatically copied
    to /boot/kernel.old. Besides you don't use configure, make, make install to
    compile and install a new kernel but "make buildkernel KERNCONF=YOURKERNEL"
    and "make installkernel KERNCONF=YOURKERNEL".

    http://www.de.freebsd.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig-building.html

    >
    > (2) Secondly I dont understand the boot prompt and the loader prompt
    > completely. at the boot prompt I guess I can specify the kernel I want to
    > load. So lets say I have my custom kernel in the directory
    > /boot/mydir/custom-kernel. so how do I specify at the boot prompt or the
    > loader prompt to load the custom kernel
    >

    well theoretically you type at boot prompt:

    "unload kernel"
    "boot mydir"

    I'm not really sure what happens if you rename the kernel itself. Personally I
    would ONLY copy or move the directory.

    > (3) And finally I had downloaded the source code of freeBSD and I
    > configured, did a make and a make install without making any changes
    > ...(Just to get it started!) ... when I rebooted the system it failed to
    > recognize the disk and so I reinstalled FreeBSD again...( hadnt enabled any
    > debug options so could not recover any information!!)... Is there anything
    > that "HAS" to be done before installing the new kernel?
    >

    Kernel and "world" should be in sync. So if you download the sources you want
    to reinstall world _and_ kernel. This is especially important when there were
    version changes in between.

    http://www.de.freebsd.org/doc/en_US.ISO8859-1/books/handbook/synching.html
    http://www.de.freebsd.org/doc/en_US.ISO8859-1/books/handbook/makeworld.html

    > any help will be appreciated.

    I hope this helps a little bit since I'm also not an expert.... :)

    Ben

    >
    > Thank you
    > HKR
    >
    >
    >
    >
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  • Next message: bsd hack: "Re: Regarding FreeBSD Custom Kernel"

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