ipcalc(images) - phpMan

IPCALC(1)                   General Commands Manual                  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 AT redhat.com>
       Preston Brown <pbrown AT redhat.com>

       IPv6 supported wedged in by David Cantrell <dcantrell AT 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)