How do I boot FreeBSD and Linux from LILO?

If you have FreeBSD and Linux on the same disk, just follow LILO's installation instructions for booting a non-Linux operating system. Very briefly, these are:

Boot Linux, and add the following lines to /etc/lilo.conf:

    other=/dev/hda2
            table=/dev/hda
            label=FreeBSD

(the above assumes that your FreeBSD slice is known to Linux as /dev/hda2; tailor to suit your setup). Then, run lilo as root and you should be done.

If FreeBSD resides on another disk, you need to add loader=/boot/chain.b to the LILO entry. For example:

    other=/dev/dab4
            table=/dev/dab
            loader=/boot/chain.b
            label=FreeBSD

In some cases you may need to specify the BIOS drive number to the FreeBSD boot loader to successfully boot off the second disk. For example, if your FreeBSD SCSI disk is probed by BIOS as BIOS disk 1, at the FreeBSD boot loader prompt you need to specify:

    Boot: 1:da(0,a)/kernel

On FreeBSD 2.2.5 and later, you can configure boot(8) to automatically do this for you at boot time.

The Linux+FreeBSD mini-HOWTO is a good reference for FreeBSD and Linux interoperability issues.



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