The correct syntax is
sage -n --port 1234
(no space between -- and port, because --port is just an option name)

it seems to be a doumentation error that one needs a space.


On Mon, Feb 21, 2022 at 2:45 AM ph h <hohoang...@gmail.com> wrote:
>
> Hi,
>
> ~/sage-9.6/b01$ ./sage --notebook --help
> usage: sage-notebook [-h] [--log LOG] [--notebook [NOTEBOOK]]
>
> The Sage notebook launcher is used to start the notebook, and allows
> you to choose between different implementations. Any further command
> line options are passed to the respective notebook.
>
> optional arguments:
>   -h, --help            show this help message and exit. Can be combined with 
> "--notebook=[...]" to see notebook-
>                         specific options
>   --log LOG             one of [DEBUG, INFO, ERROR, WARNING, CRITICAL]
>   --notebook [NOTEBOOK], -n [NOTEBOOK], -notebook [NOTEBOOK]
>                         The notebook to run [one of: default, ipython, 
> jupyter, jupyterlab, export]. Default is
>                         jupyter
>
> EXAMPLES:
>
> * Run default notebook on port 1234. Note that the first argument
>   after "-n" will be interpreted as notebook name unless you stop
>   processing with "--":
>
>       sage -n default port=1234
>       sage -n -- port=1234      # equivalent
>       sage -n port=1234         # ERROR: invalid notebook name
>
> Did I miss something in the attached screen capture?
>
> Thank you for your help.
>
> Regards,
>
> phiho
>
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