ifconfig Command--linux command application of large dictionary 729 commands interpretation

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Ifconfig command

use the ifconfig command to display and configure network interfaces, such as setting an IP address,MAC address, activating or shutting down a network interface.

Command syntax:

ifconfig [ interface ] [ Options | IP Address ]

The meanings of the options in the command are as shown in the table.

table ifconfig command options meaning

Options	Meaning
-A	Show status of all network interfaces
Add < address >	set the network device's IPV6 Address
del < address >	Remove the network device IPV6 Address
Media< ';	set media type for network devices
Metric < number >	Specifies the number of packets to be added when calculating the forwarding times of a packet
MTU < >	set the maximum transmission unit of the network device ( mtu)
Netmask < Subnet mask >	Set the subnet mask for a network device
Up	Activates the specified network device
down
HW < > < hardware address ;	set the hardware address for this interface ( mac ethernet ( ampr ax.25 arcnet< Span style= "font-family: ' The song Body '; > and netrom ( ampr net/rom
Txqueuelen < length ;	Set the length of the device send queue
tunnel< Address >	Create the tunnel communication address between IPv4 and IPv6

Example: Configure the IP address of the NIC Eth0 and activate the device at the same time.

[[Email protected] ~] #ifconfig eth0 192.168.0.2 netmask 255.255.255.0 up

Example: Configure the IP address of the alias device eth0:1 for the NIC Eth0 .

[Email protected] ~]# ifconfig eth0:1 192.168.0.3

Example: Activating the NIC eth0:1 device.

[Email protected] ~]# ifconfig eth0:1 up

Example: Check The configuration of the NIC eth0 settings.

[Email protected]~]# ifconfig eth0

Eth0 Link encap:ethernet HWaddr 00:0c:29:fc:2f:e5

inet addr:192.168.0.2 bcast:192.168.0.255 mask:255.255.255.0

Inet6 Addr:fe80::20c:29ff:fefc:2fe5/64scope:link

Up broadcast RUNNING multicast mtu:1500 metric:1

RX packets:11833 errors:0 dropped:0overruns:0 frame:0

TX packets:14789 errors:0 dropped:0overruns:0 carrier:0

collisions:0 txqueuelen:1000

RX bytes:953120 (930.7 KiB) TX bytes:12258316 (11.6 MiB)

The IP address of the Eth0 network card is 192.168.0.2, andthe MAC address is 00:0c:29:fc:2f:e5

Example: View all the network card devices.

[[Email protected]~]# ifconfig-a

Example: Turn off the NIC eth0:1 device.

[Email protected] ~]# ifconfig eth0:1 down

Example: Change the NIC eth0 hardware MAC address to 00:0c:29:18:2e:3d.

[Email protected] ~]# ifconfig eth0 hw ether 00:0c:29:18:2e:3d

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ifconfig Command--linux command application of large dictionary 729 commands interpretation