From Fedora Project Wiki
Description
This test case creates a dual boot system with two Fedoras of different release versions, using btrfs snapshots, works as expected
Setup
- Install Fedora 36. Any desktop, using Automatic partitioning.
- Freshen your backups, just in case
- Backup
/boot/efi
, just in case
How to test
- create a snapshot
- edit the dnfconf,
- dup the most recent bls snippet, modify its
rootflags
entry to match the snapshot name
Expected Results
- GRUB menu shows boot options: variant+version+kernelversion for switching between the two.
- Can also use
grubby --set-default=/boot/vmlinuz-5.18.15-200.fc36.x86_64