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

       -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@redhat.com>
       Preston Brown <pbrown@redhat.com>


REPORTING BUGS

       Report     bugs     to     our     bugtracking     system:
       http://bugzilla.redhat.com/bugzilla.

       Copyright © 1997-2001 Red Hat, Inc.
       This  is  free software; see the source for copying condi­
       tions.  There is NO warranty; not even for MERCHANTABILITY
       or FITNESS FOR A PARTICULAR PURPOSE.


SEE ALSO

       ipcalc(3)


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