Charles Roberts wrote:Yes. This way uses 2 lilo.conf. One in the MBR (by having 'boot=/dev/hda' in the 1st OS lilo.conf, and the other lilo.conf goes in
John Richard Smith wrote:
I'm thinking about dual booting the same OS but updating the second to test.
I'm not sure of all the implications.
I have a /boot partition. That means I will be overwriting the first kernel init etc, with the same, cannot think that is likely to be any problem.
Lilo will still be in the MBR, but it will have the script from second install,
because there is no option available these days to skip lilo install.Developers please note.
Second install will use it's own /etc/lilo.conf file.
but this is likely to be the naff OS , especially if it goes wrong with the updates.
Not, to my mind, a satisfactory state of affairs. I want to be booting everything from the first OS /etc/lilo.conf. Question is how to do that.
F1-rescue - install new bootloader ,
but it's going to have two identicle OS's each with it's own /etc/lilo.conf
how will it know which to choose ?
In otherwords how do I tell it which OS /etc/lilo.conf script it's to use ?
each OS will have it's seperate partition, lets say for arguements sake, M9.1 OS1 on /hda7 M9.1 OS2 on /hda6
can I pass some arguement in the F1 -rescue - install new boot loader , to tell it which partition to look for an /etc/lilo.conf ?
Does say, F1 - rescue /dev/hda7 make anything useful happen to where it reads /etc/lilo.conf ?
I bet there is a way round this
anyone ?
John
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Hi John;
Not sure if I understand all you have said! But to boot two OS:
1st OS install lilo in MBR
2nd OS install lilo in the 2nd OS's hard disk partition. like this root=hda5, boot=hda5 Change hda5 to where ever you installed the 2nd OS
Add an 'other' line in the 1st OS lilo to point to the 2nd OS. like this: other=/dev/hda5
label="Debian" or whatever
In the 2nd OS lilo;
boot=/dev/hda5 root=/dev/hda5 everthing else normal
Now when you boot, select 'Debian' which will take you to the 2nd OS lilo. then select what you want from the 2nd Os.
If you want I will send you my 2 lilo.conf's.
HTH Charles
So if I've understood you correctly, in effect you're chainloading two lilo's , one stored in the MBR(to work with windblows , chainloader fashion)and booting M9.1 OS1 from it's /etc/lilo.conf and a second lilo in the M9.1 OS2 situated in it's / partition,it seems a mite complicated.
In addition I'm not too sure how you get the second OS install to put the second lilo in it's / partiton, when the installer will be conscious of the windblows/OS1 lilo MBR presence and wanting to shove lilo in the MBR again.
currently I have,
/dev/hda1 W2000
/dev/hda7 M9.1 (straight install, no updates)
/dev/hda6 M9.0 (to be replaced with M9.1 , together with cooker updates)
At the moment so long as I have two Different linux OS's I can switch which OS /etc/lilo.conf file is read and run at boot time, by replacing the lilo in the MBR with either F1 - rescue - install bootloader from "either CD1 of each OS".
The problem here is that I have two identicle OS's and I'm affraid that having just the one CD1 to do the F1 - rescue - install bootloader it will not know which /etc/lilo.conf to run at boot time.
This is because each OS has it's own /etc/lilo.conf in the relevant / partition. Maybe it doesn't matter so long as each /etc/lilo.conf is constructed to boot either OS, so that whichever /etc/lilo.conf it chooses to run , it will still have enough script to boot either OS.Still I'd like to be a mite more precise about it.
Maybe you are right though. Having two Identicle OS means having to lilo's to boot with.
John
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/dev/hda9 (by having 'boot=/dev/hda9' in the 2nd OS lilo.conf. If you would like to be more precise about it, read 'man lilo.conf'.
Charles
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