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	=== Display Network Interfaces ===		=== Display Network Interfaces ===

Admin: Created page with "Category:Wiki === Display Network Interfaces === To display all active network interfaces and their configurations: ifconfig This command will show information such as the interface name (e.g., `eth0`, `wlan0`), the IP address, the MAC address, and other network interface parameters. To display all interfaces, including those that are down, use: ifconfig -a === Configure an IP Address === You can configure an IP address f..."

2025-12-14T16:23:59Z

Created page with "Category:Wiki === Display Network Interfaces === To display all active network interfaces and their configurations: <nowiki> ifconfig</nowiki> This command will show information such as the interface name (e.g., `eth0`, `wlan0`), the IP address, the MAC address, and other network interface parameters. To display all interfaces, including those that are down, use: <nowiki> ifconfig -a</nowiki> === Configure an IP Address === You can configure an IP address f..."

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[[Category:Wiki]]

=== Display Network Interfaces ===

To display all active network interfaces and their configurations:

<nowiki>
ifconfig</nowiki>

This command will show information such as the interface name (e.g., `eth0`, `wlan0`), the IP address, the MAC address, and other network interface parameters.

To display all interfaces, including those that are down, use:

<nowiki>
ifconfig -a</nowiki>

=== Configure an IP Address ===

You can configure an IP address for a network interface using the following syntax:

<nowiki>
ifconfig <interface> <IP_address> netmask <netmask></nowiki>

For example, to assign the IP address `192.168.1.10` with a subnet mask `255.255.255.0` to interface `eth0`, use:

<nowiki>
ifconfig eth0 192.168.1.10 netmask 255.255.255.0</nowiki>

To assign an IP address to a wireless interface, for example `wlan0`, use:

<nowiki>
ifconfig wlan0 192.168.1.10 netmask 255.255.255.0</nowiki>

=== Bring Interface Up or Down ===

To activate (bring up) a network interface, use:

<nowiki>
ifconfig <interface> up</nowiki>

For example:

<nowiki>
ifconfig eth0 up</nowiki>

To deactivate (bring down) a network interface, use:

<nowiki>
ifconfig <interface> down</nowiki>

For example:

<nowiki>
ifconfig eth0 down</nowiki>

=== Set MAC Address ===

You can change the MAC (Media Access Control) address of a network interface using the `hw` flag:

<nowiki>
ifconfig <interface> hw ether <new_mac_address></nowiki>

For example, to set a new MAC address on interface `eth0`:

<nowiki>
ifconfig eth0 hw ether 00:11:22:33:44:55</nowiki>

Note: Changing the MAC address might require the interface to be brought down and up again.

=== Enable or Disable Promiscuous Mode ===

Promiscuous mode allows a network interface to receive all packets on the network, even those that are not addressed to it. To enable promiscuous mode:

<nowiki>
ifconfig <interface> promisc</nowiki>

To disable promiscuous mode:

<nowiki>
ifconfig <interface> -promisc</nowiki>

Example:

<nowiki>
ifconfig eth0 promisc</nowiki>

=== View Network Statistics ===

To view detailed statistics for a network interface, including the number of packets sent and received, errors, collisions, etc., use the following command:

<nowiki>
ifconfig <interface></nowiki>

For example:

<nowiki>
ifconfig eth0</nowiki>

This will display statistics like:

- RX (received) bytes
- TX (transmitted) bytes
- Errors, dropped packets, etc.

=== Set MTU (Maximum Transmission Unit) ===

The MTU defines the maximum size of a packet that can be transmitted over a network interface. To set the MTU for a network interface:

<nowiki>
ifconfig <interface> mtu <mtu_size></nowiki>

For example, to set the MTU size of `eth0` to 1500 bytes:

<nowiki>
ifconfig eth0 mtu 1500</nowiki>

=== Set Broadcast Address ===

To set the broadcast address for a network interface:

<nowiki>
ifconfig <interface> broadcast <broadcast_address></nowiki>

For example, to set the broadcast address of `eth0`:

<nowiki>
ifconfig eth0 broadcast 192.168.1.255</nowiki>

=== View a Specific Interface's Information ===

To view information about a specific network interface, simply specify the interface name:

<nowiki>
ifconfig <interface></nowiki>

For example, to display the information for `eth0`:

<nowiki>
ifconfig eth0</nowiki>

=== Useful Links ===

* [Linux ifconfig Manual](https://man7.org/linux/man-pages/man8/ifconfig.8.html)
* [ifconfig Command Reference](https://linux.die.net/man/8/ifconfig)
* [Networking in Linux](https://www.tldp.org/HOWTO/Net-HOWTO.html)
* [Wikipedia: Ifconfig](https://en.wikipedia.org/wiki/Ifconfig)
* [Linux Networking Documentation](https://www.kernel.org/doc/html/latest/networking/index.html)

IFCONFIG - Documentation - Revision history

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