How you can see if a package or commando exists in a Bash script.
The simplest way to check if a commando exists is the
command -v <package> command. For example, it can look like
command -v brew.
By using it in an if-statement, we can see if the package is installed inside of a Bash script.
if [[ $(command -v brew) ]]; then echo "🍺 Homebrew already installed" fi