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/