debian man page for addr2name

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 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.  Typi-
	      cally 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
       Remi Denis-Courmont <remi at remlab dot net>

       $Id: addr2name.1 658 2010-10-31 20:56:30Z remi $

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

addr2name				      $Date: 2010-10-31 22:56:30 +0200 (dim. 31 oct. 2010) $				      ADDR2NAME(1)