instance can not restart after reboot

chen 21 Reputation points
2021-05-21T07:39:07.857+00:00

For my machine learning computation instances.
It errored

Operating system disk has run out of disk space. Clear at least 5 GB disk space on OS disk (/dev/sda1/ filesystem mounted on /) through the terminal by removing files/folders, and then do sudo reboot. You can check available disk space by running df -h. For more details refer to https://aka.ms/cidiskfull
The VM disk is full. Delete jobs, tasks, or files on the node to free up space and then reboot the node.

After I clean the disk, I do sudo reboot in the terminal. unfortunately, the instance still error the above error message and I can not access to the terminal anymore.

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