If for some reasons after updating the Web-GUI is broken, but the device is still accessible via ssh, the device can be flashed via the command line.
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You should reboot the device right before executing following steps, to avoid having to much log files taking file space.
Do not reboot or power off the device, while running the ddflash.sh tool
Preparations:
If you are under Windows you need an SSH client, e.g. putty:
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