Updating

Keeping TezSign Up-to-Date

⚠️ WARNING: Experimental Updater The tezsign_updater is currently experimental. Please backup all files from your data partition before proceeding. IMPORTANT: Image Compatibility Note This update process only works if you are using an image from 21.11.2025 or newer.

If you are using an older image:

  1. Backup your data partition.
  2. Re-flash the SD card with the latest full image.
  3. Copy your backed-up files into the dedicated tezsign folder on the new data partition. (This is required due to a one-time layout change).

Update Procedure

  1. Stop the device: Disconnect the TezSign device from the baker machine. If you use external power, power it off.

  2. Remove SD Card: Eject the SD card from the device.

  3. Connect to Manager: Insert the SD card into the reader on your manager machine.

  4. Download Updater: If you do not have it already, download the tezsign_updater from the GitHub Releases page.

    Example command to download and make executable:

    wget [https://github.com/tez-capital/tezsign/releases/download/release-202512022318/tezsign_updater_linux_amd64](https://github.com/tez-capital/tezsign/releases/download/release-202512022318/tezsign_updater_linux_amd64) -O tezsign_updater && chmod +x tezsign_updater

  5. Run the Updater: Execute the updater tool. It will automatically scan for viable SD cards, check partition layouts, and verify the existence of TezSign files.

    sudo ./tezsign_updater

    Note: You can run ./tezsign_updater -h to see all available options.

  6. Select SD Card: Choose the SD card you wish to flash from the available list. The tool will indicate OK for devices that match the TezSign layout.

  7. Choose Update Type: Select the kind of update you wish to perform:

    • Full: Updates all partitions except the data partition. (Slower)
    • App: Updates only the TezSign application. (Fast)

  8. Finish: Once the update is complete, remove the SD card from your manager machine, insert it back into your TezSign device, and reconnect it to the baker machine.

Any questions/comments/concerns? Please contact the Tez Capital team on Discord or Telegram