help   This command is not implemented.

       ?      This command is not implemented.

       exit   This command exits the program.

       set keyword[=value]
              This command is used to change state information that affects the
              lookups. Valid keywords are:

              all    This keyword prints the current values of  the  frequently
                     used options to set. Information about the current default
                     server and host is also printed.

              class=value
                     This keyword changes the query class to one of:

                     IN     the Internet class

                     CH     the Chaos class

                     HS     the Hesiod class

                     ANY    wildcard

                     The class specifies the protocol group of the information.
                     The  default  is  IN; the abbreviation for this keyword is
                     cl.

              nodebug
                     This keyword turns on or off the display of the  full  re‐
                     sponse packet, and any intermediate response packets, when
                     searching.  The  default  for this keyword is nodebug; the
                     abbreviation for this keyword is [no]deb.

              nod2   This keyword turns debugging mode on or off. This displays
                     more about what nslookup is doing. The default is nod2.

              domain=name
                     This keyword sets the search list to name.

              nosearch
                     If the lookup request contains at least  one  period,  but
                     does  not end with a trailing period, this keyword appends
                     the domain names in the domain search list to the  request
                     until an answer is received. The default is search.

              port=value
                     This  keyword changes the default TCP/UDP name server port
                     to value from its default, port 53. The  abbreviation  for
                     this keyword is po.

              querytype=value | type=value
                     This  keyword changes the type of the information query to
                     value. The defaults are A and then AAAA; the abbreviations
                     for these keywords