The nas-tui tool was developed to provide administrators with lower-level troubleshooting and configuration options compared to the NAS dashboard. The tool can be accessed either via SSH or by directly connecting to the NAS with a screen and keyboard.
The tool I therefore very useful in the event that network connectivity is lost with the NAS, or you need to make network changes.
Launching the tool
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Login via SSH or the console
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Run the command:
nas-tui