What is “rush” Package?

GNU’s Restricted User SHell
For more details: https://www.gnu.org/software/rush/

Installation

• Open Terminal by pressing command+space then type terminal and hit Enter key.
• Install homebrew first.

  ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)" < /dev/null 2> /dev/null

• Install rush.

  brew install rush

Now, use rush!