ipcalc - perform simple manipulation of IP addresses
ipcalc [OPTION]... <IP address>[/prefix] [netmask]
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.
-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 Dont ever display error messages.
Erik Troan <firstname.lastname@example.org> Preston Brown <email@example.com>
IPv6 supported wedged in by David Cantrell <firstname.lastname@example.org>
Report bugs at http://bugzilla.redhat.com/
Copyright © 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.||IPCALC (1)||April 30 2001|