ipcalc(1) - 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 netmasks, 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 war-
       ranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.



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

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