First, we will install the package manager homebrew.
The shell you use is probably bash, but it may be something different like zsh (especially on OS X). You should be able to check your shell with:
echo $SHELL
If is gives /bin/bash, then you are using bash, if it gives something else like /bin/zsh then you may need to change where the notes say ~/.bash_profile below to ~/.zsh_profile. If the notes don't work for that, use ~/.bashrc below to ~/.zshrc instead of ~/.bash_profile or ~/.zsh_profile.
Take note of which profile file you need to use for actions below and be aware of the options.
If you are working on a linux system and don't have root access (you are a user on a multi-user system) you can install brew as a user:
mkdir -p ${HOME}/homebrew && curl -L https://github.com/Homebrew/brew/tarball/master | tar xz --strip 1 -C ${HOME}/homebrew
Here, we have installed brew in ${HOME}/homebrew, so you will need to add that directory to your PATH below.
First, install homebrew:
/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
Note that on OS X brew needs the Xcode compiler Command Line Tools which can take a little time to download if yo dont have it installed. It is possible that the script can fail a first time, but if it does, just try re-running it.
Read the information that happens when you install brew. It should say something like:
==> This script will install:
/opt/homebrew/bin/brew
which means you need to make sure /opt/homebrew/bin is in your PATH. It might say /usr/local/bin instead of /opt/homebrew/bin, so pay attentioopn to that.
You should know which profile file you need from above. It will probaby be ~/.bash_profile or ~/.zsh_profile, but you may need to use ~/.bashrc or ~/.zshrc.
You should know the directory that brew was installed. This will probably be /usr/local/bin or /opt/homebrew/bin or ${HOME}/homebrew.
Then type one of the following as appropriate:
echo 'PATH="${HOME}/homebrew:${PATH}"' >> ~/.bash_profile
or
echo 'PATH="/opt/homebrew/bin:${PATH}"' >> ~/.zshrc
or
echo 'PATH="/usr/local/bin:${PATH}"' >> ~/.bash_profile
or similar, as appropriate.
Now, we can test this. Open a new shell: either open a new terminal or type bash (or zsh) in the current terminal, as appropriate.
Test brew:
brew install hello
If that fails, check that you used the right file ~/.zsh_profile or ~/.bash_profile above for your shell and that you opened a new shell. Don't try to go further until you have this sorted. If you need help, contact the course tutor.
For Windows, if you use WSL-Windows System for Linux, then you should be able to install and use brew as above. There is a good tutorial for that here. If you use this though, you need to also install all of the packages in WSL and run jupyter from there. There is a good tutorial on that here.
Otherwise, you might try some advice from the web.