[SOLVED] Changing start order?

[Keith2021]

I installed Mint xfce on an Acer Aspire and then I installed Zorin 15.3 and both work great. When I start the computer and let it bootup by itself it will open the Zorin. I can pick what one I want to open but I want Mint to open first if I let it bootup by itself. How or where do I change this so the first OS installed opens instead of the second OS starting first? Mint was installed first then second, Zorin. Mint is the primary OS Zorin is secondary. Thanks.

[motoryzen]

I installed Mint xfce on an Acer Aspire and then I installed Zorin 15.3 and both work great. When I start the computer and let it bootup by itself it will open the Zorin. I can pick what one I want to open but I want Mint to open first if I let it bootup by itself. How or where do I change this so the first OS installed opens instead of the second OS starting first? Mint was installed first then second, Zorin. Mint is the primary OS Zorin is secondary. Thanks.

One possible simple resolution is to go into your UEFI/bios ( aka press fWhatever key to enter setup) and see if under the boot device options or boot priorities .something to do with boot..... does it give you the choice to change which item boots up first ...IF...you see "ubuntu" once or even twice or if your bios/uefi recognizes one versus the other as having a differently labeled name...

[GELvdH]

Refer to this post, I had a similar problem.
viewtopic.php?f=46&t=337962

[all41]

I installed Mint xfce on an Acer Aspire and then I installed Zorin 15.3 and both work great. When I start the computer and let it bootup by itself it will open the Zorin. I can pick what one I want to open but I want Mint to open first if I let it bootup by itself. How or where do I change this so the first OS installed opens instead of the second OS starting first? Mint was installed first then second, Zorin. Mint is the primary OS Zorin is secondary. Thanks.

You can edit /etc/default/grub as root to select another os as default

in a terminal:

Code: Select all

sudo nano /etc/default/grub

Use the arrow keys to navigate to
GRUB_DEFAULT=0
Changing the 0 to 2 will cause the 2 os to be selected as default without
re-arranging the grub table.

After that change is saved run:

Code: Select all

sudo update-grub

then reboot

[AndyMH]

Are you booting in legacy or UEFI mode? If legacy, then zorin will have overwritten grub.

[Keith2021]

I went in the terminal and typed in sudo nano /etc/default/grub and the window comes up but it says there is no default. It is empty.
I read another post and typed in sudo grub-install /dev/sda and now it boots into the Mint but I can't boot into Zorin?
I might just install the Mint again and have just the one program.

[AndyMH]

I went in the terminal and typed in sudo nano /etc/default/grub and the window comes up but it says there is no default. It is empty.
I read another post and typed in sudo grub-install /dev/sda and now it boots into the Mint but I can't boot into Zorin?
I might just install the Mint again and have just the one program.

Which is why I asked the question, legacy or UEFI boot? sudo grub-install /dev/sda is fine for legacy boot, UEFI is a bit more complicated. One of many on the web:
https://askubuntu.com/questions/831216/ ... -partition

[Keith2021]

I got the file to come up and did what you said. this is what I get after saving it.
keith@keith-aspire-one:~$ sudo update-grub
[sudo] password for keith:
Sourcing file `/etc/default/grub'
Sourcing file `/etc/default/grub.d/50_linuxmint.cfg'
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-4.15.0-156-generic
Found initrd image: /boot/initrd.img-4.15.0-156-generic
Found linux image: /boot/vmlinuz-4.15.0-54-generic
Found initrd image: /boot/initrd.img-4.15.0-54-generic
Found memtest86+ image: /boot/memtest86+.elf
Found memtest86+ image: /boot/memtest86+.bin
Found Zorin OS 15.3 (15) on /dev/sda5
done
keith@keith-aspire-one:~$

it boots up to Mint first now in the correct order but it is at the Memory test instead of on Mint program that I usually click on.

[Jo-con-Ël]

it boots up to Mint first now in the correct order but it is at the Memory test instead of on Mint program that I usually click on.

That's because you have change GRUB_DEFAULT from 0 to 2 as all41 sugested here in Zorin's /etc/defaut/grub, as sugested before reinstalling Mint's grub as you did.

Now Mint is directing your boot if it is your first option in GRUB menu and Zorin is detected so it will be the second option in GRUB menu. If you want to boot memtest by default you will need to change GRUB_DEFAULT in Mint's /etc/default/grub and run sudo update-grub again.

PD: Sorry Ididn't read in deep what you want first time.

[Keith2021]

It is as I wanted it to be, Mint first and Zorin second. so this is solved.

The easiest way to do the sort order is to watch this video on Youtube... https://youtu.be/e8QqvMsOuo8 this give an easy quick idea as to what you need to be doing. I hope this helps others to figure this out.