Visit The New, Modern Unix Linux Community

Linux and UNIX Man Pages

Test Your Knowledge in Computers #589
Difficulty: Medium
A binary search algorithm requires that the array being searched is sorted in descending order.
True or False?
Linux & Unix Commands - Search Man Pages

rarp(8) [centos man page]

RARP(8)                                                 Linux System Administrator's Manual                                                RARP(8)

NAME
rarp - manipulate the system RARP table SYNOPSIS
rarp [-V] [--version] [-h] [--help] rarp -a rarp [-v] -d hostname ... rarp [-v] [-t type] -s hostname hw_addr NOTE
This program is obsolete. From version 2.3, the Linux kernel no longer contains RARP support. For a replacement RARP daemon, see ftp://ftp.dementia.org/pub/net-tools DESCRIPTION
Rarp manipulates the kernel's RARP table in various ways. The primary options are clearing an address mapping entry and manually setting up one. For debugging purposes, the rarp program also allows a complete dump of the RARP table. OPTIONS
-V Display the version of RARP in use. -v Tell the user what is going on by being verbose. -t type When setting or reading the RARP table, this optional parameter tells rarp which class of entries it should check for. The default value of this parameter is ether (i.e. hardware code 0x01 for IEEE 802.3 10Mbps Ethernet . Other values might include network tech- nologies such as AX.25 (ax25) and NET/ROM (netrom). -a --list Lists the entries in the RARP table. -d hostname --delete hostname Remove all RARP entries for the specified host. -s hostname hw_addr --set hostname hw_addr Create a RARP address mapping entry for host hostname with hardware address set to hw_addr. The format of the hardware address is dependent on the hardware class, but for most classes one can assume that the usual presentation can be used. For the Ethernet class, this is 6 bytes in hexadecimal, separated by colons. WARNING
Some systems (notably older Suns) assume that the host replying to a RARP query can also provide other remote boot services. Therefore never gratuitously add rarp entries unless you wish to meet the wrath of the network administrator. FILES
/proc/net/rarp, SEE ALSO
arp(8), route(8), ifconfig(8), netstat(8) AUTHORS
Ross D. Martin, <martin@trcsun3.eas.asu.edu> Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org> Phil Blundell, <Philip.Blundell@pobox.com> net-tools 2008-10-03 RARP(8)

Check Out this Related Man Page

ARP(8)							     Linux Programmer's Manual							    ARP(8)

NAME
arp - manipulate the system ARP cache SYNOPSIS
arp [-evn] [-H type] [-i if] -a [hostname] arp [-v] [-i if] -d hostname [pub] arp [-v] [-H type] [-i if] -s hostname hw_addr [temp] arp [-v] [-H type] [-i if] -s hostname hw_addr [netmask nm] pub arp [-v] [-H type] [-i if] -Ds hostname ifa [netmask nm] pub arp [-vnD] [-H type] [-i if] -f [filename] DESCRIPTION
Arp manipulates the kernel's ARP cache in various ways. The primary options are clearing an address mapping entry and manually setting up one. For debugging purposes, the arp program also allows a complete dump of the ARP cache. OPTIONS
-v, --verbose Tell the user what is going on by being verbose. -n, --numeric shows numerical addresses instead of trying to determine symbolic host, port or user names. -H type, --hw-type type, -t type When setting or reading the ARP cache, this optional parameter tells arp which class of entries it should check for. The default value of this parameter is ether (i.e. hardware code 0x01 for IEEE 802.3 10Mbps Ethernet). Other values might include network tech- nologies such as ARCnet (arcnet) , PROnet (pronet) , AX.25 (ax25) and NET/ROM (netrom). -a [hostname], --display [hostname] Shows the entries of the specified hosts. If the hostname parameter is not used, all entries will be displayed. The entries will be displayed in alternate (BSD) style. -d hostname, --delete hostname Remove any entry for the specified host. This can be used if the indicated host is brought down, for example. -D, --use-device Use the interface ifa's hardware address. -e Shows the entries in default (Linux) style. -i If, --device If Select an interface. When dumping the ARP cache only entries matching the specified interface will be printed. When setting a perma- nent or temp ARP entry this interface will be associated with the entry; if this option is not used, the kernel will guess based on the routing table. For pub entries the specified interface is the interface on which ARP requests will be answered. NOTE: This has to be different from the interface to which the IP datagrams will be routed. -s hostname hw_addr, --set hostname Manually create an ARP address mapping entry for host hostname with hardware address set to hw_addr class, but for most classes one can assume that the usual presentation can be used. For the Ethernet class, this is 6 bytes in hexadecimal, separated by colons. When adding proxy arp entries (that is those with the publish flag set a netmask may be specified to proxy arp for entire subnets. This is not good practice, but is supported by older kernels because it can be useful. If the temp flag is not supplied entries will be permanent stored into the ARP cache. NOTE: As of kernel 2.2.0 it is no longer possible to set an ARP entry for an entire subnet. Linux instead does automagic proxy arp when a route exists and it is forwarding. See arp(7) for details. -f filename, --file filename Similar to the -s option, only this time the address info is taken from file filename set up. The name of the data file is very often /etc/ethers, but this is not official. If no filename is specified /etc/ethers is used as default. The format of the file is simple; it only contains ASCII text lines with a hostname, and a hardware address separated by whitespace. Additionally the pub, temp and netmask flags can be used. In all places where a hostname is expected, one can also enter an IP address in dotted-decimal notation. As a special case for compatibility the order of the hostname and the hardware address can be exchanged. Each complete entry in the ARP cache will be marked with the C flag. Permanent entries are marked with M and published entries have the P flag. FILES
/proc/net/arp, /etc/networks /etc/hosts /etc/ethers SEE ALSO
rarp(8), route(8), ifconfig(8), netstat(8) AUTHORS
Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org> with a lot of improvements from net-tools Maintainer Bernd Eckenfels <net- tools@lina.inka.de>. net-tools 5 Jan 1999 ARP(8)

Featured Tech Videos