NAME

       addr2name, name2addr - perform DNS lookups from scripts

SYNOPSIS

       addr2name [-46cmnr] [HOSTNAMES]

       name2addr [-46cn] [HOSTNAMES]

DESCRIPTON

       Write  addresses  or  canonical  hostname of specified names to the standard output. If no
       names are specified via the command line, they are read from the standard input.

OPTIONS

       -4 or --ipv4
              Only try to perform IPv4 lookups.

       -6 or --ipv6
              Only try to perform IPv6 lookups.

       -c or --config
              Only lookup and print results for address families that  match  locally  configured
              addresses  (If  the  system  has  no  IPv4  resp  IPv6 address, then IPv4 resp IPv6
              addresses are ignored).

       -h or --help
              Display some help and exit.

       -m or --multiple
              Normally, if a name yields multiple results, only the first one is  printed.   With
              this optional parameter, all results will be printed on a single line, separated by
              spaces.

       -n or --numeric
              Prevent forward hostname lookup.  This ensures that the  input  names  are  numeric
              addresses,  which  do  not  need  to  be  looked  up. Typically used along with the
              --reverse option to convert numerical addresses to canonical hostnames.

       -r or --reverse
              Perform a reverse DNS lookup (enabled implicitly with addr2name).  addr2name prints
              numerical resolved addresses by default instead.

       --version
              Display program version and license and exit.

SEE ALSO

       host(1), getaddrinfo(3), getnameinfo(3), resolv.conf(5)

AUTHOR

       Rémi Denis-Courmont <remi at remlab dot net>

       http://www.remlab.net/ndisc6/