Is there a way to disable shell and system OS execution?

[Hoc Phan]

Is it possible to prevent people from using exclamation mark (!ls /) to run shell command line?

Second question, is it possible to prevent from using Python (os, system) to run any OS command line?

I guess the easy way is to run Docker container for each notebook, where the user can do whatever they want. I think that's how try.jupyter.org and Kaggle does. But if there is a way to prevent shell in general, that'd be great. Please advise.

[Thomas Kluyver]

There is no practical way I know of to block the user from running system commands. And even if there was, almost anything that you can do with a shell, you can also do from Python code.

If you are letting untrusted users execute code on your system, the only sane approach is to run inside some kind of container without access to the system outside the container.

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