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Jupyter / Start Jupyterlab Debug Mode

Start Jupyterlab Debug Mode

Launch JupyterLab with debug mode enabled for detailed logging and troubleshooting insights.

$
Terminal
jupyter lab --debug

When To Use

Use this command when troubleshooting issues in JupyterLab.

Terminal Output

Expected runtime feedback

Simulated preview
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Output
[I 12:00:00.000 LabApp] JupyterLab extension loaded from /path/to/jupyterlab
[I 12:00:00.000 LabApp] JupyterLab application directory is /path/to/jupyterlab
[I 12:00:00.000 LabApp] Serving notebooks from local directory: /path/to/notebooks
[I 12:00:00.000 LabApp] The Jupyter Notebook is running at:
[I 12:00:00.000 LabApp] http://localhost:8888/lab?token=abc123
[I 12:00:00.000 LabApp] 0 active kernels
[I 12:00:00.000 LabApp] Use Control-C to stop this server and shut down all kernels (twice to skip confirmation).

Command Breakdown

What each part is doing

jupyter
Base Command
The executable that performs this operation. Here it runs Jupyter before the shell applies any redirect operators.
--debug
Command Option
Tool-specific option used by this command invocation.

How To Run

Execution path

  1. Step 1

    Open your terminal or command prompt.

  2. Step 2

    Run the command: jupyter lab --debug.

  3. Step 3

    Review the output for detailed logs and troubleshooting information.

Alternative Approaches

Comparable commands in other tools

Alternative documentation tools for the same job.