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nslookup:tldr:1ec16
The command "nslookup" is used for querying the Domain Name System (DNS) to obtain information about IP addresses, domain names, and other DNS records.
In this specific command, "nslookup -type=PTR ${54-240-162-118}", we are trying to perform a reverse DNS lookup for the IP address "54.240.162.118".
The option "-type=PTR" indicates that we want to query for a specific type of DNS record called a "PTR" (Pointer) record. The PTR record is used to map an IP address to a corresponding domain name.
The IP address "54.240.162.118" is enclosed within the curly brackets "${ }". The command should be updated to actually include the IP address in place of "${54-240-162-118}" for accurate execution, like this: "nslookup -type=PTR 54.240.162.118".
By running this command, you will receive the reverse DNS information associated with the provided IP address.