Setting up snapper on Arch
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https://www.youtube.com/watch?v=_97JOyC1o2o

Date: September 5, 2022

https://www.youtube.com/watch?v=_97JOyC1o2o

[code]
  snapper
  snap-pac
  grub-btrfs

Note
────

These are mostly my notes to remind myself, I’d Highly reccomend watching this-video <https://www.youtube.com/watch?v=_97JOyC1o2o> or reading this arch wiki page <https://wiki.archlinux.org/title/snapper>

/.snapshots already exists error
────────────────────────────────

When I started running sudo snapper -c root create-config / I ran into the following error.

Image: snapshots-already-exists.webp <https://dropper.waylonwalker.com/api/file/689b85ad-aa94-44d2-a05b-111de5f29400.webp>

[code]
  Creating config failed (creating btrfs subvolume .snapshots failed since it already exists).

remove existing snapshots
─────────────────────────

[code]
  sudo umount /.snapshots
  sudo rm -r /.snapshots

configure snapper
─────────────────

[code]
  sudo snapper -c root create-config /
  sudo snapper -c home create-config /home

btrfs subvolumes
────────────────

[code]
  sudo btrfs subvolume list /

Image: btrfs-subvolume-list.webp <https://dropper.waylonwalker.com/api/file/dbd2e2ee-3bd7-47a3-a808-578f96d3d6d4.webp>

[code]
  sudo btrfs subvolume delete /.snapshots
  sudo mkdir /.snapshots

[code]
  # you might not see snapshots mounted yet
  lsblk

  # if you check fstab you will see an entry for it
  cat /etc/fstab

  # mount it
  sudo mount -a

  # now you should see /.snapshots mounted
  lsblk

You should now see .snapshots in mountpoints.

Image: lsblk-snapshots.webp <https://dropper.waylonwalker.com/api/file/c551d2be-0441-4dc7-8ee5-6ba600faa126.webp>

Setting the default to @
────────────────────────

so that you can boot into snapper snapshots

[code]
  sudo btrfs subvol get-default /
  sudo btrfs subvol list /

Image: btrfs-subvol-get-default.webp <https://dropper.waylonwalker.com/api/file/231bb2a9-1679-4c42-9fd9-1fa6d7490cb2.webp>

[code]
  sudo btrfs subvol set-default 256 /
  sudo btrfs subvol get-default /
  ## ID 256 gen 105268 top level 5 path @

Image: btrfs-subvol-set-default.webp <https://dropper.waylonwalker.com/api/file/1780cbfe-0c71-432e-bef6-00db6a7d9563.webp>

snapper ls
──────────

[code]
  sudo snapper ls

Image: snapper-ls-init.webp <https://dropper.waylonwalker.com/api/file/24741b02-db31-41fe-957b-6eec2600db2b.webp>

leaving off for now

https://youtu.be/_97JOyC1o2o?t=909

config
──────

[code]
  sudo nvim /etc/snapper/configs/root

[code]
  ALLOW_GROUPS="wheel"

  # limits for timeline cleanup
  TIMELINE_MIN_AGE="1800"
  TIMELINE_LIMIT_HOURLY="5"
  TIMELINE_LIMIT_DAILY="7"
  TIMELINE_LIMIT_WEEKLY="0"
  TIMELINE_LIMIT_MONTHLY="0"
  TIMELINE_LIMIT_YEARLY="0"

[code]
  sudo chown -R :wheel /.snapshots/