Goal: Restrict content access through username and password entry on an Nginx server. 1: Apache Utilities Package First, update your server’s package index: sudo apt updateCheck if the utilities package exists in your environment by executing the command dpkg --get-selections | grep apacheResponse: apache2-utils install libapache-pom-java installSo it exists.  But what do you do if it doesn't exist? How come I need to install apache-utils?  To restrict access you will be using...