Difference between revisions of "Ifconfig"

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<code>[[wikipedia:ifconfig|ifconfig]]</code>is a command in Unix-like operating systems like Linux<ref>https://linux.die.net/man/8/ifconfig</ref>, [[FreeBSD]], [[OpenBSD]], [[macOS]] for [[Ethernet]] network interface configuration.
 
<code>[[wikipedia:ifconfig|ifconfig]]</code>is a command in Unix-like operating systems like Linux<ref>https://linux.die.net/man/8/ifconfig</ref>, [[FreeBSD]], [[OpenBSD]], [[macOS]] for [[Ethernet]] network interface configuration.
  
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<code>ifconfig</code> command is included in the <code>[[net-tools]]</code> package but not installed by default in RHEL since version 7<ref>https://lwn.net/Articles/710533</ref>.
 
<code>ifconfig</code> command is included in the <code>[[net-tools]]</code> package but not installed by default in RHEL since version 7<ref>https://lwn.net/Articles/710533</ref>.
  
== Configuring an alias IP ==
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== [[Configuring an alias IP]] ==
=== Linux alias ===
 
ifconfig eth0''':0''' 192.168.1.6 up
 
 
 
=== [[macOS]] [[alias]] ===
 
Configure 3 alias in <code>en1</code> interface, https://ss64.com/osx/ifconfig.html:
 
<pre>
 
sudo ifconfig en1 inet 192.168.10.2/24 add
 
sudo ifconfig en1 inet 192.168.20.2/24 add
 
sudo ifconfig en1 inet 192.168.30.2/24 add
 
</pre>
 
or
 
<pre>
 
sudo ifconfig en1 inet 192.168.10.2/24 alias
 
sudo ifconfig en1 inet 192.168.20.2/24 alias
 
sudo ifconfig en1 inet 192.168.30.2/24 alias
 
</pre>
 
 
 
 
 
Remove/Delete alias:
 
sudo ifconfig en1 inet 192.168.10.2/24 delete
 
  
 
== Activities ==
 
== Activities ==
* Show interface configuration in Linux including ip addresses: <code>ifconfig -a</code> or <code>ip a</code>
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* Show interface configuration in Linux including ip addresses: <code>[[ifconfig -a]]</code> or <code>[[ip a]]</code>
 
* Show interface Ethernet network capabilities of your interface, such as speed, with: <code>mii-tool -v YOUR_INTERFACE_NAME</code>,  <code>mii-tool -v eth0</code>
 
* Show interface Ethernet network capabilities of your interface, such as speed, with: <code>mii-tool -v YOUR_INTERFACE_NAME</code>,  <code>mii-tool -v eth0</code>
* Show all network inferfaces in Linux:<ref>https://www.cyberciti.biz/faq/linux-list-network-cards-command/</ref>
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* [[Show all network interfaces in Linux]]:<ref>https://www.cyberciti.biz/faq/linux-list-network-cards-command/</ref>
::<code>[[lspci]] | egrep -i --color 'network|ethernet'</code>
 
::<code>[[lshw]] -class network</code>
 
::<code>[[ifconfig -a]]</code>
 
::<code>[[ip link]] show</code>
 
::<code>ip a</code>
 
::<code>cat [[/proc/]]net/dev</code>
 
::<code>cat [[/proc/]]net//proc/net/fib_trie</code> (ips)
 
::<code>systemd/networkctl|networkctl list</code>
 
::<code>nmcli|nmcli device show</code>
 
 
 
 
* Learn about [https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/networking_guide/ch-consistent_network_device_naming Linux Naming Schemes Hierarchy].
 
* Learn about [https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/networking_guide/ch-consistent_network_device_naming Linux Naming Schemes Hierarchy].
  
 
* Change your [[MAC]] address: <code>ifconfig {eth0|wlan0} hw ether CA:CA:CA:CA:CA:CA</code>
 
* Change your [[MAC]] address: <code>ifconfig {eth0|wlan0} hw ether CA:CA:CA:CA:CA:CA</code>
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* [[macOS]]: <code>[[ipconfig getifaddr]] en0</code>
  
== Related terms ==
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== Related ==
 +
* <code>[[ifconfig -v]]</code>
 
* <code>[[docker inspect]] CONTAINER_NAME | grep IPAddress</code>
 
* <code>[[docker inspect]] CONTAINER_NAME | grep IPAddress</code>
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* Linux: <code>[[hostname -I]]</code>, <code>[[hostname -i]]</code>
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anpi0 anpi1 anpi2 ap1 awdl0 bridge0 en0 en1 en2 en3 en4 en5 en6 gif0 llw0 lo0 stf0 utun0 utun1 utun2 utun3
  
 
== See also ==
 
== See also ==
* {{Linux networking commands}}
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* {{Linux networking}}
 
* <code>[[ipconfig]]</code> Windows command
 
* <code>[[ipconfig]]</code> Windows command
 
* {{MacOS networking}}
 
* {{MacOS networking}}
 
* [[bonding]]
 
* [[bonding]]
* [[Eth]]
 
  
 
== References ==
 
== References ==

Latest revision as of 12:11, 23 September 2022

ifconfigis a command in Unix-like operating systems like Linux[1], FreeBSD, OpenBSD, macOS for Ethernet network interface configuration.


In macOS, the ifconfig command functions as a wrapper to the IPConfiguration agent, and can control the BootP and DHCP clients from the command-line. Use of ifconfig to modify network settings in Mac OS X is discouraged, because ifconfig operates below the level of the system frameworks which help manage network configuration. To change network settings in Mac OS X from the command line, use /usr/sbin/ipconfig or /usr/sbin/networksetup.

ifconfig command is included in the net-tools package but not installed by default in RHEL since version 7[2].

Configuring an alias IP[edit]

Activities[edit]

Related[edit]

anpi0 anpi1 anpi2 ap1 awdl0 bridge0 en0 en1 en2 en3 en4 en5 en6 gif0 llw0 lo0 stf0 utun0 utun1 utun2 utun3

See also[edit]

References[edit]

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Source: https://en.wikiversity.org/wiki/Ifconfig

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