Tensorboard not found as magic function in jupyter

If you are using TF 2.0 you can execute the code below from your notebook environment, prior to your magic command:

%load_ext tensorboard

UPDATE

For newer TF versions (tensorflow>=1.14.0 & tensorflow != 2.0.0a0 - newer than TF2.0-alpha) load the extension like this

%load_ext tensorboard

OLD ANSWER

The extension needs to be loaded first:

%load_ext tensorboard.notebook
%tensorboard --logdir {logs_base_dir}