What is “nagios” Package?

Network monitoring and management system
For more details: https://www.nagios.org/

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 nagios.

  brew install nagios

Now, use nagios!