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Macintosh Terminal Pocket Guide: Take Command of Your Mac. ^ "pSeries and AIX Information Center".

^ "DNS and BIND, Fourth Edition: Chapter 12.Root name server - top-level name servers providing top level domain name resolution.List of DNS record types - possible types of records stored and queried within DNS.host is a simple utility for performing Domain Name System lookups.dig, a utility interrogates DNS servers directly for troubleshooting and system administration purposes.The non interactive mode searches the information for a specified host using the default name server. when the first argument is a name or Internet address of the host being searched, parameters and the query are specified as command line arguments in the invocation of the program. The - (minus sign) invokes subcommands which are specified on the command line and should precede nslookup commands. When no arguments are given, then the command queries the default server. When used interactively by invoking it without arguments or when the first argument is - (minus sign) and the second argument is a hostname or Internet address of a name server, the user issues parameter configurations or requests when presented with the nslookup prompt ( >). Nslookup operates in interactive or non-interactive mode. The ReactOS version was developed by Lucas Suggs and is licensed under the GPL. The Linux version of nslookup was written by Andrew Cherenson. Some behaviors of nslookup may be modified by the contents of nf. Additionally, vendor-provided versions may include output of other sources of name information, such as host files, and Network Information Service. Unlike dig, nslookup does not use the operating system's local Domain Name System resolver library to perform its queries, and thus may behave differently. This decision was reversed in 2004 with the release of BIND 9.3 and nslookup has been fully supported since then. Early in the development of BIND 9, the Internet Systems Consortium planned to deprecate nslookup in favor of host and dig. Nslookup was a member of the BIND name server software.