Linux in a Nutshell, Fifth Edition

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Chapter 3: Linux Commands

This is the Title of the Book, eMatter Edition

Copyright © 2006 O’Reilly & Associates, Inc. All rights reserved.

netmask mask

(inet only) Specify how much of the address to reserve for

subdividing networks into subnetworks. mask can be

specified as a single hexadecimal number with a leading

0x, with a dot notation Internet address, or with a

pseudo-network name listed in the network table /etc/

networks.

pointopoint/-pointopoint [address]

Enable/disable point-to-point interfacing, so that the

connection between the two machines is dedicated.

promisc/-promisc

Enable/disable promiscuous mode. Promiscuous mode

allows the device to receive all packets on the network.

txqueuelen n

Specify the transmit queue length.

tunnel addr

Create an IPv6-in-IPv4 (SIT) device, tunneling to IPv4

address addr.

up

Mark an interface “up” (ready to send and receive).

addresses

Each address is either a hostname present in the hostname

database (/etc/hosts), or an Internet address expressed in the

Internet standard dot notation.

Examples

To list all interfaces:

ifconfig -a

To add a second IP address to wlan0:

ifconfig wlan0:1 192.168.2.41 netmask 255.255.255.0

To change the hardware address (MAC address) assigned to eth0

(useful when setting up a router for a DSL or cable modem):

ifconfig eth0 hw ether 01:02:03:04:05:06

imapd

imapd [options]

TCP/IP command. The Interactive Mail Access Protocol (IMAP)

server daemon. ...