ngrep:tldr:71416

The command "ngrep host ${www-example-com}" is a command that uses the ngrep tool to capture network traffic that contains the specified host "www-example-com". Here's a breakdown of the command: - ngrep: It is a network packet analyzer that allows you to capture and display network packets. - host: It is an option or a filter used in ngrep to specify the host or hostname you want to filter for in the network traffic. - ${www-example-com}: It represents the value of the variable "www-example-com". In this case, it is assumed that "www-example-com" is a placeholder for the actual hostname or domain name you want to filter for. By running this command, ngrep will capture and display network packets that involve the specified host "www-example-com" in their communication.