/categories/private/ Recent content in Private on dnk8n Hugo -- gohugo.io en Mon, 16 Nov 2020 09:43:17 +0000 /posts/create-readonly-btrfs-snapshots-and-restore-them-if-required/ Mon, 16 Nov 2020 09:43:17 +0000 /posts/create-readonly-btrfs-snapshots-and-restore-them-if-required/ Mount btrfs volumes to disk: sudo mount /dev/mapper/luks-<TAB> /mnt/btrfs Make a read-only snapshot: sudo btrfs subvolume snapshot -r /mnt/btrfs/system_fedora33 /mnt/btrfs/snapshots/system_fedora33/@snapshot_$(date '+%Y-%m-%d_%H-%M') Rollback snapshot created: Boot into an alternative operating system Rename filesystem for safety: sudo mv /mnt/btrfs/system_fedora33 /mnt/btrfs/system_fedora33_bak Reinstate snapshot as a read+write filesystem: sudo btrfs subvolume snapshot /mnt/btrfs/snapshots/system_fedora33/@snapshot_2020-01-01_01-01 /mnt/btrfs/system_fedora33 Delete the no longer required read-only snapshot: sudo btrfs subvolume delete /mnt/btrfs/snapshots/system_fedora33/@snapshot_2020-01-01_01-01 Remove original filesystem once restore is proven to work: sudo btrfs subvolume delete /mnt/btrfs/system_fedora33_bak