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duel booting and Install ?

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rc racer
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duel booting and Install ?

#1 Post by rc racer » Mon Oct 08, 2018 12:57 pm

When I first switched to Linux, I had a friend who knows something about Linux, do an install with Linux Mint along side Windows 10. If I remember right the duel boot worked ok until windows upgraded automatically and I lost the Grub. I came to the decision to just reinstall Mint. Now I have found that I really like MX Horizon 17.1, probably better, but i still want to keep up with Linux mint. So I want to do two things. I want to upgrade My linux mint 18 to Linux mint 19 and I want to install MX 17.1. The questions I have since I am not considering a duel boot with windows is does it matter if I install Linux Mint first or MX 17? Will installing one ahead of the other effect the Grub. I am doing the duel boot on my own this time and want to be sure I do it right.
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fehlix
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Re: duel booting and Install ?

#2 Post by fehlix » Mon Oct 08, 2018 1:17 pm

The last installed Grub is the controlling Grub and shall also have menu-entries for booting into other installed OS's.
So it doesn't matter if you install first Mint and than MX. You can always reinstall from with either Mint or MX
to have the Grub from this OS become the controlling grub.

EDIT: On MBR/MSDOS / legacy BIOS systems you have only one controlling Grub.
On UEFI system you can have per OS one (or more) menu-entries within the UEFI-Boot menu
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rc racer
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Re: duel booting and Install ?

#3 Post by rc racer » Mon Oct 08, 2018 3:02 pm

I am sure my pc is to old for the UEFI system so I will have only one controlling Grub. I understand this to mean if I install MX 17 first then that will be the Grub that controls which operating system I can boot into. Correct?
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Re: duel booting and Install ?

#4 Post by fehlix » Mon Oct 08, 2018 3:07 pm

rc racer wrote:
Mon Oct 08, 2018 3:02 pm
I am sure my pc is to old for the UEFI system so I will have only one controlling Grub. I understand this to mean if I install MX 17 first then that will be the Grub that controls which operating system I can boot into. Correct?
Yes, you will see one Grub-menu fro MX Linux together with menuentries for Linux Mint and WinOS.
In the rare case if menu entries are missing, e.g for Windows.
You simply regenerate the menu-entries for Grub by running this from
the terminal command line within the installed Linux system:

Code: Select all

sudo update-grub
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Re: duel booting and Install ?

#5 Post by rc racer » Mon Oct 08, 2018 3:20 pm

Thanks for the sudo command, "just in case" and for your help.
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Re: duel booting and Install ?

#6 Post by fehlix » Mon Oct 08, 2018 3:52 pm

rc racer wrote:
Mon Oct 08, 2018 3:20 pm
Thanks for the sudo command, "just in case" and for your help.
Here another one, just in case:
Say you have installed MX Linux , which now provides the "controlling" Grub,
and later you upgraded Linux Mint, which might take over Grub,
and Linux Mint has now the "controlling" grub.
Say further you have one hard disk drive "/dev/sda", where all you partitions are.
You can now make MX Linux have the controlling Grub back by,
selecting the MX Linux menu-entry (from Mint's Grub menu) and booting
into MX Linux and run this:

Code: Select all

sudo grub-install /dev/sda
The next time you boot, you will find MX Linux as the first menu entry,
as MX Linux is now the "controller" of the Grub menu.
:puppy:
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