Recently I wrote an article about using dig and whois on Windows 7. If you want to review the previous article click here. A question recently came up about how to whois .de domains. For each TLD or Top Level Domain such as .de, .co.uk, .mil, .ru, etc. you will need to use a different whois server. Below there is information about attempting to run whois against google.de without specifying a different whois server followed by information using the proper whois server.
Using whois can be a valuable tool to find out more information about a domain via the command line in Linux. A typical whois query can be performed to find out where the domain was purchased and using it again with the -h (host switch) can provide more detailed information about the domain. Using the -h switch will typically provide information such as who purchased the domain, when the domain was purchased, when the domain expires, etc. Below are a couple basic examples of how whois can be used followed by whois queries with the output.