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IPCALC(1)							     IPCALC(1)



NAME
       ipcalc - perform simple manipulation of IP addresses

SYNOPSIS
       ipcalc [OPTION]... <IP address>[/prefix] [netmask]


DESCRIPTION
       ipcalc  provides	 a  simple way to calculate IP information for a host.
       The various options specify what information ipcalc should  display  on
       standard	 out.  Multiple	 options  may  be specified.  An IP address to
       operate on must always be specified.  Most operations  also  require  a
       netmask or a CIDR prefix as well.


OPTIONS
       -c, --check
	      Validate	the  IP address under the specified family.  If
	      no address family is specified, IPv4 is assumed.


       -4, --ipv4
	      Specify IPv4 address family (default).


       -6, --ipv6
	      Specify IPv6 address family.


       -b, --broadcast
	      Display the broadcast address for the  given  IP	address
	      and netmask.


       -h, --hostname
	      Display the hostname for the given IP address.


       -m, --netmask
	      Calculate	 the  netmask  for  the	 given	IP  address. It
	      assumes that the IP address is in a complete class A,  B,
	      or  C  network. Many networks do not use the default net-
	      masks, in which  case  an	 inappropriate	value  will  be
	      returned.


       -p, --prefix
	      Show the prefix for the given mask/IP address.


       -n, --network
	      Display  the network address for the given IP address and
	      netmask.


       -s, --silent
	      Don't ever display error messages.


AUTHORS
       Erik Troan <ewt@redhat.com>
       Preston Brown <pbrown@redhat.com>


       IPv6 supported wedged in by David Cantrell <dcantrell@redhat.com>

REPORTING BUGS
       Report bugs at http://bugzilla.redhat.com/

COPYRIGHT
       Copyright (C) 1997-2008 Red Hat, Inc.
       This is free software; see the source  for  copying  conditions.
       There  is  NO  warranty; not even for MERCHANTABILITY or FITNESS
       FOR A PARTICULAR PURPOSE.



Red Hat, Inc.			 April 30 2001			     IPCALC(1)
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