CentOS, Fedora & RedHat in 1 box Post: 302086417

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Operating Systems Linux Ubuntu CentOS, Fedora & RedHat in 1 box Post 302086417 by Corona688 on Wednesday 23rd of August 2006 08:08:43 PM

08-23-2006

Registered User

Yes, I don't see why not. As for how the partitions would be laid out, that depends on...how you want your partitions laid out.

The bare minimum, as I see it:

/dev/hda1 -- 200mb of ext2 to hold kernels and grub settings.
/dev/hda2 -- 512mb, swap space. They can all use the same swap.
/dev/hda3 -- A couple gigs of ext3 for common space. Mount it on something like /opt/shared for all three distros, so you can dump a file there in one distro, reboot into another distro, and still have that file.
/dev/hda4 -- All remaining space, as an extended partition.
/dev/hda5 -- First partition in extended partition. Holds root partition for Distro #1.
/dev/hda6 -- Second partition in extended partition. Holds root partition for Distro #2.
/dev/hda7 -- Third partition in extended partition. Holds root partition for Distro #3.

grub.conf for this monster is going to look something like:

Code:

title=Centos
kernel (hd0,0)/centos/kernel-2.6.12-r10 root=/dev/hda5

title=Fedora
kernel (hd0,0)/centos/kernel-2.6.12-r10 root=/dev/hda6

title=Redhat
kernel (hd0,0)/centos/kernel-2.6.12-r10 root=/dev/hda7

Even better would be three seperate boot partitions, one for each distro, but that'd mean booting from an extended partition, and I'm not sure how much grub likes that.

Finding a guide for this is unlikely imho, as it'd have to be written by someone who's mastered the same versions of all three distros of interest. You're going to have fun getting all of them to install where you want them.

Of course, if you're going to want multiple boot partitions for each and every distro, things are going to get more complicated.

Corona688

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LEARN ABOUT OPENSOLARIS

installgrub

installgrub(1M) 					  System Administration Commands					   installgrub(1M)

NAME

       installgrub - install GRUB in a disk partition or a floppy

SYNOPSIS

       /sbin/installgrub [-fm] stage1 stage2 raw-device

DESCRIPTION

       The installgrub command is an x86-only program. GRUB stands for GRand Unified Bootloader.

       installgrub  installs  GRUB  stage  1  and  stage  2  files on the boot area of a disk partition. If you specify the -m option, installgrub
       installs the stage 1 file on the master boot sector of the disk.

OPTIONS

       The installgrub command accepts the following options:

       -f    Suppresses interaction when overwriting the master boot sector.

       -m    Installs GRUB stage1 on the master boot sector interactively. You must use this option if Solaris is installed on an extended  parti-
	     tion.

OPERANDS

       The installgrub command accepts the following operands:

       stage1	     The name of the GRUB stage 1 file.

       stage2	     The name of the GRUB stage 2 file.

       raw-device    The  name of the device onto which GRUB code is to be installed. It must be a character device that is readable and writable.
		     For disk devices, specify the slice where the GRUB menu file is located. (For Solaris it is the root  slice.)  For  a  floppy
		     disk, it is /dev/rdiskette.

EXAMPLES

       Example 1 Installing GRUB on a Hard Disk Slice

       The following command installs GRUB on a system where the root slice is c0d0s0:

	 example# /sbin/installgrub /boot/grub/stage1 
		  /boot/grub/stage2 /dev/rdsk/c0d0s0

       Example 2 Installing GRUB on a Floppy

       The following command installs GRUB on a formatted floppy:

	 example# mount -F pcfs /dev/diskette /mnt
	 # mkdir -p /mnt/boot/grub
	 # cp /boot/grub/* /mnt/boot/grub
	 # umount /mnt
	 # cd /boot/grub
	 # /sbin/installgrub stage1 stage2 /dev/rdiskette

FILES

       /boot/grub    Directory where GRUB files reside.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Uncommitted		   |
       +-----------------------------+-----------------------------+

SEE ALSO

       boot(1M), fdisk(1M), fmthard(1M), kernel(1M), attributes(5)

WARNINGS

       Installing GRUB on the master boot sector (-m option) overrides any boot manager currently installed on the machine. The system will always
       boot the GRUB in the Solaris partition regardless of which fdisk partition is active.

SunOS 5.11							    31 Oct 2008 						   installgrub(1M)