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That’s right, it can only be done in this black window. Of course, you can also install the desktop, but it is not recommended.

ls -a There is a space in the middle

It’s not that there is no response, it’s that there are no files in the current directory. Just cd / and then ls to see all the files.

Yes, that’s it, view all files ls -la

Yes, there are no files in the ~ directory. After cd /, you can ls again, and some directories of the server will appear.