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Dual boot between two Fedora 25 installs possible?

asked 2017-01-24 14:31:54 -0500

Bart78 gravatar image

Hi All,

I would like to know if it is possible to dual boot between two fedora 25 workstation installs from the same disk?

I have a USB 3.0 SSD 250 GB disk already booting one Fedora 25 install using 1 boot partition 500MB, 1 root partition 100GB and one SWAP partition of 16GB (and performing more than acceptable). The remaining space I would like to use for another Fedora 25 install and cleanly separate the two (reason being development purposes).

Is this possible? If yes, how? Or at least some pointers to the how :-).

Thanks in advance for the help.

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Another option would be to run your development machine as a virtual machine. That way you have even access to both machines at the same time. And you get around some hassle caused

  • the LVM bug described below,
  • using the same /home for two different installs (config files)
  • updating boot menu after kernel upgrade
  • ...
florian gravatar imageflorian ( 2017-01-25 12:09:54 -0500 )edit

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answered 2017-01-25 11:35:13 -0500

cmurf gravatar image

Due to this bug LVM volumes for the 1st installation will be inactive during the 2nd installation, therefore grub2-mkconfig won't see the 1st installation, and therefore there will be no menu entries. If you're lucky, running grub2-mkconfig while booted in the 2nd installation, will create a grub menu with both OS's. Note that any kernel updates in the 1st installation will not be reflected in the grub menu, because that grub menu is "owned" by the 2nd installation, so you'll have to boot the 2nd installation and re-run grub2-mkconfig for the changes to get reflected.

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answered 2017-01-25 05:29:41 -0500

ceres2009 gravatar image

updated 2017-01-25 05:44:11 -0500

i never tried this, but as Fedora is using LVM with unique IDs for each Drive and Partition and Grub can be configured to boot from a specific partition. I see no reason, why it should fail. IMHO just partition the second Fedora completly manually during install. Update: I found an how to here: https://www.linux.com/answers/how-can-i-dual-boot-two-or-more-linux-distros.

The accepted answer there was:

Don't worry, dual booting Linux distros is a mind numbingly simple task. First, take either OS and make a complete, full install. (So that that distro takes up all disk space.) Then just install your second OS, but this time during the boot process just select how much space you want the second OS to have. After that, you have a dual boot system. You will now be able to select either distro in GRUB during boot up.

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As a relative expert in multibooting Windows, Linux and macOS, I think dual booting Linux is vile. It is mind numbing, but not in the good way. It suffers from the flawed upstream design that GRUB's users are the distro devs, not actual end users. Yes it's cool that it can be done and can be understood. But unless you like hacking things all the time, the UX is atrocious.

cmurf gravatar imagecmurf ( 2017-01-25 11:41:14 -0500 )edit

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Asked: 2017-01-24 14:31:54 -0500

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Last updated: Jan 25 '17