How to install two distros in one drive? UEFI gpt

Cuauhtli · 09-07-2020, 09:04 PM

Hello, I tried to install Manjaro and Ubuntu in a single HDD 250GB
But the grubs of the two distros are giving me headaches with the installations. I tried installing one distro first, the second one with sharing efi and swap, then updating the grub (sudo update-grub). But always I have problems, no matter if the first distro is manjaro or ubuntu.

My partition scheme is this:

EFI 512MB (shared)
swap 6GB (shared)
/ Manjaro
/ Ubuntu

Also, my specs:
i7 9700k | rtx 2060 | 32gb ram (dual channel) | 250GB HDD | b360n

colorpurple21859 · 09-08-2020, 03:55 PM

Quote:

But the grubs of the two distros are giving me headaches

Give more detail in the problem. Normally the distro installed last will be the grub menu you see when you turn on the system.
If there is a kernel update in the other distro you will need to reboot back into the distro that controls the grub menu and rerun the command that updates the grub boot menu. If it isn't working as it should another option is to create a custom menuentry that will load the grub.cfg configfile of the other distro in the /etc/grub/40_custom file.

post the ouput of

Code:

parted -l

colorpurple21859 · 09-09-2020, 06:14 PM

Did a test in a vm duel booting ubuntu and manjaro, I think I see what the problem is. The distros grub os-prober are not producing correct menu entries for booting the other system. A work around would be to create a /etc/grub.d/15_custom file in ubuntu with this in it:

Code:

#!/bin/sh
exec tail -n +3 $0
# This file provides an easy way to add custom menu entries.  Simply type the
# menu entries you want to add after this comment.  Be careful not to change
# the 'exec tail' line above.
menuentry "Manjaro configfile"{
insmod part_gpt 
insmod ext2
set root='hd0,gpt?'
configfile /boot/grub/grub.cfg
}

where the ? will be the partition number of Manjaro counting from one. You can make a copy of the /etc/grub.d/40_custom and rename it 15_custom
You will have to make it exectable with

Code:

sudo chmod +x /etc/grub.d/15_custom

Then run

Code:

sudo update-grub

What this does is produces a ubntu grub menu entry that will upload manjaro boot menu.

peter debba · 09-17-2020, 04:08 PM

i am using manjaro alongside ubuntu and both work oke, the only thing is that ubuntu boots normally meanwhile i have to use an alternative boot for manjaro (initrans or something like this), the grub is the ubuntu grub,
i am trying to fix this and your information is great, its just that meanwhile i am not sure what these commands exactly mean i am first trying to figure it out a bit more before running them,
anyway, you are helping me greatly and giving me some confidence i will be able to work it out,
thank you
peter

colorpurple21859 · 09-17-2020, 08:09 PM

Quote:

the grub is the ubuntu grub,

I edited post 3 to reflect this and additional information