jupyterlab/docs/source/user/running.md

Managing kernels and terminals

The Running tab in the left sidebar shows a list of all the kernels and terminals currently running across all notebooks, code consoles, and directories:

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As with the classic Jupyter Notebook, when you close a notebook document, code console, or terminal, the underlying kernel or terminal running on the server continues to run. This allows you to perform long-running actions and return later. The Running tab allows you to re-open or focus the document linked to a given kernel or terminal:

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Kernels or terminals can be shut down from the Running tab:

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You can shut down all kernels and terminals by clicking the X button:

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