records to MB (mail box) records. -o (Photoshop web design) Do
records to MB (mail box) records. -o Do not print output to standard out. -p [server] For use with -l. Query only the zone’s primary nameserver (or server) for zone transfers, instead of those authoritative servers that respond. Useful for testing unregistered zones. -q Quiet. Suppress warning, but not error, messages. -r Do not ask contacted server to query other servers, but require only the information that it has cached. -t type Look for type entries in the resource record. type may be A, NS, PTR, ANY, or * (all). -u Use TCP, not UDP. -v Verbose. Include all fields from resource record, even time-to-live and class, as well as “additional information” and “authoritative nameservers” (provided by the remote nameserver). -vv Very verbose. Include information about host’s defaults. -w Never give up on queried server. -x Allow multiple hosts or zones to be specified. If a server is also specified, the argument must be preceded by -X. -A For hostnames, look up the associated IP address, and then reverse look up the hostname, to see if a match occurs. For IP addresses, look up the associated hostname, and determine whether the host recognizes that address as its own. For zones, check IP addresses for all hosts. Exit silently if no incongruities are discovered. -C Similar to -l, but also check to see if the zone’s name servers are really authoritative. The zone’s SOA (start of authority) records specify authoritative name servers (in NS fields). Those servers are queried; if they do not have SOA records, host reports a lame delegation. Other checks are made as well. -D Similar to -H but include the names of hosts with more than one address per defined name.