name2addr(1) - man - phpman

ADDR2NAME(1)                                User's Manual                               ADDR2NAME(1)



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  ad‐
              dresses  (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 ad‐
              dresses, 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/



addr2name                                      $Date$                                   ADDR2NAME(1)