Re: How to install two linux OSes on the same PC

Re: How to install two linux OSes on the same PC

[Bryan Andersen]

I'm not remembering much about the RH install, but have you tried using 
a console durring the early part of the installand repointing the mount 
points to where you want them?  This is a question that is best for 
RedHat's own lists.  I know this can be done as I've done it in the 
past.  It's been awhile since I've admined RedHat systems for 
developers.  I'm only admining Debian systems now.

- Bryan

Narsimha Reddy CHALLA wrote:
>    Device Boot    Start       End    Blocks   Id  System
> /dev/hda1   *         1       261   2096451    6  FAT16
> /dev/hda2           262      2434  17454622+   5  Extended
> /dev/hda5           262       522   2096451    6  FAT16
> /dev/hda6           523       653   1052226   83  Linux
> /dev/hda7           654      1175   4192933+  83  Linux
> /dev/hda8          1176      1371   1574338+  83  Linux
> /dev/hda9          1372      1436    522081   82  Linux swap
> /dev/hda10         1437      1501    522081   83  Linux
> /dev/hda11         1502      1566    522081   83  Linux
> [root@creddy-pc root]#
> 
> 
> TIA,
> - Narsimha Reddy CH
> -
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Re: How to install two linux OSes on the same PC

[Dave Vehrs]

On Wed, 2003-02-05 at 15:06, Narsimha Reddy CHALLA wrote:
>     I want to do two different linux installations rh 7.2 and rh 
> 8.0 on the same pc with single hard disk. I installed the rh 7.2 in
> partitions say  /dev/hda5 ( /) ,  /dev/hda6  (/home) ,  /dev/hda7 (
> /usr) ,/dev/hda8 ( /tmp),... /dev/hda11  etc. 
> 
>    But how can I install the rh 8.0 in partitions say  /dev/hda12
> ( as "/" )  ... etc ??  Since the installer won't allow as there
> already exists a  "/"  partition for the rh 7.2 and tries to override
> it with the root partition of rh 8.0. So I tried giving a different
> lable to the root partition of rh 8.0 say /root1 and other partitions
> as /root1/usr, /root1/home, /root1/tmp etc. But here also the installer
> is looking for the partition named "/" and without that the installation
> is not happening. 

I believe the problem is related to Redhat's use of partition labels
by default on 7.x and 8.x.   Makes it easy if the drives master/slave 
changes but causes problems for other things like this.  

For example, my /etc/fstab looks like: 
LABEL=/        /            ext3    defaults        1 1
LABEL=/boot    /boot        ext2    defaults        1 2
LABEL=/home    /home        ext3    defaults        1 2
/dev/hda3      swap         swap    defaults        0 0
/dev/cdrom     /mnt/cdrom   iso9660 noauto,owner,kudzu,ro 0 0

Attempting to boot a system with two drives (or multiple partitions on
the same drive) configured like this will confuse the system.  So the
first step would be to change the LABEL= lines to /dev/<device>  (i.e.
/dev/hda1      /boot ......etc.)

Next issue is how you want to boot the two systems.  One boot partition
or two?  With one boot, make a copy of what is already there, then
install the new system, allowing it to overwrite the old.  Then merge
the two boot partitions by hand.  They will already be a different
kernels, etc. so it shouldn't be too hard.  

Then I would recommend booting the second system or mounting its drives
in the first temporarily and making similar changes to its fstab that we
did to the first.  

Then reboot and I believe it should work....

Good luck,

Dave V.

-- 
David E Vehrs, System Engineer		Aspen Systems
davidv@aspsys.com			3900 Youngfield Street
Tel: +01 303 431 4606			Wheat Ridge CO 80033, USA
Fax: +01 303 431 7196			http://www.aspsys.com

How to install two linux OSes on the same PC

[Narsimha Reddy CHALLA]

Hi  All,

    I want to do two different linux installations rh 7.2 and rh 
8.0 on the same pc with single hard disk. I installed the rh 7.2 in
partitions say  /dev/hda5 ( /) ,  /dev/hda6  (/home) ,  /dev/hda7 (
/usr) ,
/dev/hda8 ( /tmp),... /dev/hda11  etc. 

   But how can I install the rh 8.0 in partitions say  /dev/hda12
( as "/" )  ... etc ??  Since the installer won't allow as there
already exists a  "/"  partition for the rh 7.2 and tries to override
it with the root partition of rh 8.0. So I tried giving a different
lable to the root partition of rh 8.0 say /root1 and other partitions
as /root1/usr, /root1/home, /root1/tmp etc. But here also the installer
is looking for the partition named "/" and without that the installation
is not happening. 


Please give your suggestions on how to resolve this problem.


At present my partition table with single installation (rh 7.2)  is,

[root@creddy-pc root]# fdisk -l

Disk /dev/hda: 255 heads, 63 sectors, 2434 cylinders
Units = cylinders of 16065 * 512 bytes

   Device Boot    Start       End    Blocks   Id  System
/dev/hda1   *         1       261   2096451    6  FAT16
/dev/hda2           262      2434  17454622+   5  Extended
/dev/hda5           262       522   2096451    6  FAT16
/dev/hda6           523       653   1052226   83  Linux
/dev/hda7           654      1175   4192933+  83  Linux
/dev/hda8          1176      1371   1574338+  83  Linux
/dev/hda9          1372      1436    522081   82  Linux swap
/dev/hda10         1437      1501    522081   83  Linux
/dev/hda11         1502      1566    522081   83  Linux
[root@creddy-pc root]#


TIA,
- Narsimha Reddy CH

Re: How to install two linux OSes on the same PC

[Narsimha Reddy CH]

Thanks a lot for your help. It really worked with disk driud. It 
cleverly managed the name conflicts of lables i.e. for first 
installation the root is "/" and for the second installation the root 
lable is "/1". After editing the /etc/lilo.conf of first installation 
and updating the MBR with /sbin/lilo appropriately, I can boot both of them.

Regards,
- Narsimha


Narsimha Reddy CHALLA wrote:

>Hi  All,
>
>    I want to do two different linux installations rh 7.2 and rh 
>8.0 on the same pc with single hard disk. I installed the rh 7.2 in
>partitions say  /dev/hda5 ( /) ,  /dev/hda6  (/home) ,  /dev/hda7 (
>/usr) ,
>/dev/hda8 ( /tmp),... /dev/hda11  etc. 
>
>   But how can I install the rh 8.0 in partitions say  /dev/hda12
>( as "/" )  ... etc ??  Since the installer won't allow as there
>already exists a  "/"  partition for the rh 7.2 and tries to override
>it with the root partition of rh 8.0. So I tried giving a different
>lable to the root partition of rh 8.0 say /root1 and other partitions
>as /root1/usr, /root1/home, /root1/tmp etc. But here also the installer
>is looking for the partition named "/" and without that the installation
>is not happening. 
>
>
>Please give your suggestions on how to resolve this problem.
>
>
>At present my partition table with single installation (rh 7.2)  is,
>
>[root@creddy-pc root]# fdisk -l
>
>Disk /dev/hda: 255 heads, 63 sectors, 2434 cylinders
>Units = cylinders of 16065 * 512 bytes
>
>   Device Boot    Start       End    Blocks   Id  System
>/dev/hda1   *         1       261   2096451    6  FAT16
>/dev/hda2           262      2434  17454622+   5  Extended
>/dev/hda5           262       522   2096451    6  FAT16
>/dev/hda6           523       653   1052226   83  Linux
>/dev/hda7           654      1175   4192933+  83  Linux
>/dev/hda8          1176      1371   1574338+  83  Linux
>/dev/hda9          1372      1436    522081   82  Linux swap
>/dev/hda10         1437      1501    522081   83  Linux
>/dev/hda11         1502      1566    522081   83  Linux
>[root@creddy-pc root]#
>
>
>TIA,
>- Narsimha Reddy CH
>-
>To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
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>Please read the FAQ at  http://www.tux.org/lkml/
>
>
>  
>


-- 
Narsimha Reddy CH
Storage Area Networking, HCL Technologies
Contact +91-044 2372 8366 ext 1128

http://san.hcltech.com
http://www.hcltech.com