With the release macOS Catalina, the default shell is now zsh. Thankfully, it can run the same bash commands.
To edit the zsh configuration file, type:
Add the alias commands at the end of the file as shown in the episode.
To reload the shell changes, type the following:
To update the prompt text, type the following in .zshrc:
PROMPT=$'\n'"%d %n@%m "$'\n'"> "
Save and exit. Make sure to reload the changes by typing:
Here is the link to customize your terminal if you are still using Bash: https://github.com/justincase/IR_Black-OSX
Get a feel for what it's like to edit config files in Bash and how you can bend the system to your will.