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This lesson focuses on three commands in the Linux environment:
Nsswitch.conf is a directory file and tells all sorts of directories and servers from which information can be accessed. Resolv.conf is the main resolution file in a DNS server. Nmap is a tool that is used to scan a network and see what services are being given out and shows which ports are open. These tools, used simultaneously allow hackers to access a wealth of information on a network.