I want to change the Jupyter notebook theme, so I installed the themes with:

```
pip install jupyterthemes

```

The installation seems working fine but when I try to change the theme:

```
jt -t <theme_name>

```

I get:

```
jt: command not found

```

I tried to uninstall the themes:

```
pip uninstall jupyterthemes

```

but I got:

```
Skipping jupyterthemes as it is not installed

```

During the installation I got no error though.

What should I do to install the themes properly?

I'm using Ubuntu 16.04, and I installed Jupyter Notebook with pip. Jupyter works fine, it's just the themes that don't work