Enable Sideloading on the Supernote

• Open Settings on your Supernote and go to Security and Privacy.
• Enable Sideloading by switching the toggle.

Install Google Platform Tools on Your Computer

• Download the SDK Platform Tools.
• Install them on your machine. On Linux, the package includes an application named adb, which is required.

Connect Your Computer and Supernote

• Connect your Supernote to your computer.
• Run the following command to verify the connection

adb devices

Install F-Droid

• F-Droid is an app store for Android devices (including the Supernote).
• Download the fdroid.apk file and scan it with your preferred antivirus tool (e.g., VirusTotal).
• Once verified, upload the APK to your Supernote:

adb install <path>/F-Droid.apk

Install the Aurora Store via F-Droid

• On first launch, F-Droid may take a while to load available apps (requires Wi-Fi).
• Search for Aurora and install the Aurora Store. The Aurora Store is an open-source client for Google Play with a clean design and privacy features.

Install Obsidian from the Aurora Store

Open the Aurora Store and download Obsidian to your Supernote.

Customize Obsidian Settings

• On first launch, create a new vault or sync an existing one.
• For appearance, I recommend installing the Minimal theme under Appearance.
• The theme also has a companion plugin called Minimal Theme Settings.
• Switch the color scheme to E-Ink for an excellent reading and writing experience on the Supernote.

✨ That’s it! You now have Obsidian running on your Supernote, optimized for its e-ink display.

How To Do

Install the zfs-auto-snapshot package

sudo apt install zfs-auto-snapshot

On Ubuntu and Debian, cron scripts are already in place to trigger the script.

Enabling or disabling automatic snapshots for a specific ZFS is done via ZFS properties. This property is inherited by all descendant datasets, so there is no need to set it manually for each one.

sudo zfs set com.sun:auto-snapshot=true zhome/home

You should also specify where you don’t want to see snapshots.

sudo zfs set com.sun:auto-snapshot=false zhome/home/tstusr1
sudo zfs set com.sun:auto-snapshot=false zhome/home/tstusr2

You can enable or disable frequent (every 15 minutes), hourly, daily, weekly or monthly snapshots. They are all enabled by default, so the first snapshot should appear soon.

zfs set com.sun:auto-snapshot:frequent=false zhome/home/tstusr
zfs set com.sun:auto-snapshot:daily=true ...
zfs set com.sun:auto-snapshot:monthly=true ...
...

The following commands are helpful for listing, creating and destroying snapshots:

zfs list -t snapshot

zfs snapshot -r zpool/foo/bar@name

zfs destroy zpool/foo/bar@name

To restore to a certain snapshot, ZFS will roll back all the files and delete all the newer snapshots, so be careful!

zfs rollback zpool/foo/bar@name -r

ZFS itself does not support deleting large numbers of snapshots, but this command comes in handy for that purpose.

sudo zfs list -H -o name -t snapshot zhome/somedir | xargs -n1 zfs destroy

ZFS rollbacks are permanent. They recover everything from the snapshot. If you only want to recover some files or directories, ZFS does not support this directly. However, there is a workaround: Clone the snapshot to a different location and mount the clone. Restore the required files and then delete the clone.

sudo zfs clone zhome/home/ebablick@zfs-auto-snap_frequent-2025-08-25-1845 \
         -o mountpoint=/mnt zhome/ebablick_clone_of_snapshot_2025-08-25-1845

copy /mnt/... /to/...

sudo zfs destroy zhome/ebablick_clone_of_snapshot_2025-08-25-1845 -r

Take a look at the zfs-auto-snapshot(8) manual page. The tool itself offers a few interesting options for executing pre- and post-snapshot commands. The number of snapshots to keep can also be configured via command line arguments, which then need to be adapted for the cron jobs.