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*Disclaimer: I'm not a Mint (or Ubuntu) user.*

# Using _your distro's_ live image:

1. Do your partition stuff
2. Mount the new root to the live system at `/mnt`[^mount-location]
3. Mount your other partitions to the new root as they should be
4. Chroot into `/mnt`
5. Check your `/etc/fstab`, there should be an entry about mounting your root. Update it to mount the new root partition.[^fstab]
6. Update your initramfs image(s), perhaps with [`update-initramfs`](https://manpages.ubuntu.com/manpages/jammy/en/man8/update-initramfs.7.html)?
5. Run your distro's boot configuration scripts. Perhaps it's [`update-grub`](https://manpages.ubuntu.com/manpages/noble/en/man8/update-grub.8.html) for you? There are some moving parts in this step. MBR/EFI? Which bootloader?
9. `exit` the chroot
10. Unmount everything with `umount --all`
11. Reboot and see if it works
12. If it didn't, study the linux boot process in more detail. There are good articles on [Wikipedia](https://en.wikipedia.org/wiki/Booting_process_of_Linux) and [ArchWiki](https://wiki.archlinux.org/title/Arch_boot_process).


# Swap

Yeah it's probably best to decommission the current swap before everything. Your system will work fine without it too.

Personally I'd recommend just dropping the swap partition, and making a new swapfile when the other stuff is done. Swapfiles are just more flexible.



[^mount-location]: Doesn't actually matter where.
[^fstab]: Your distro could have some helpers for generating this file as well, based on the current mounts.