How do I create a Bash alias?

Question

I\'m on OSX and I need to put something like this, alias blah=\"/usr/bin/blah\" in a config file but I don\'t know where the config file is.

Answer 1

For macOS Catalina Users:

Step 1: create or update .zshrc file

vi ~/.zshrc

Step 2: Add your alias line

alias blah="/usr/bin/blah"

Step 3: Source .zshrc

source ~/.zshrc 

Step 4: Check you're alias, by typing alias on the command prompt

alias