Linux Ifconfig Command: The Best Way to Use It

Linux Ifconfig Command: The Best Way to Use It

Ubuntu, and all other Linux distros, Tools for command-line commands These are the most effective ways to communicate with the internal workings of your computer. For setting up network settings in Linux, use the ifconfig command.

Although ifconfig is an older version than the ip command it’s still preferred by many because of its simplicity and ease-of-use. How do you use it for networking interface configuration? This is how it works.

Linux ifconfig command:  use it

Installing Net-Tools

Linux distributions don’t automatically include the ifconfig command. While most system administrators will automatically install the appropriate package when they set up things, in certain cases it may not be installed on your machine. It is easy to install.

The ifconfig command will not work on systems that don’t already have it. You will get an error message along with directions on how you can install it. Simply enter the command:

sudo apt install net-tools

You will need to install ifconfig as well as a couple of other utilities for network configuration. Please note that sudo This is necessary to install ifconfig or enable/disable networks.

Installing net-tools

Ifconfig allows you to see network information

It is easiest to just run the ifconfig command without parameters. You will see information about all active interfaces including wireless and ethernet.

Viewing network information using ifconfig

It contains all relevant information regarding the network interfaces. This includes MTU (Maximum Transmission unit) value, IP addresses, You can also see packet history. Enter ifconfig –s to get the technical details in an easier-to-read format, including interface names.

Viewing network information using ifconfig

Both of these versions do not include inactive networks. Instead, you can use the ifconfig-a command to view all interfaces.

Viewing network information using ifconfig

If you know the names of all the network interfaces and want to only see the status for a specific one, then you can add its name to the “ifconfig” command. As an example:

ifconfig eth0

Viewing network information using ifconfig

Use ifconfig to enable or disable network connections

Ifconfig can be used to check the status and configuration of all running networks. To configure nearly every feature of these interfaces (down to their MTU or masking), you can use the command ifconfig.

It is possible to either start or stop network connections. This is the simplest case. The following command will do the trick:

sudo ifconfig name up

The actual network name can be found in the “name” parameter. This parameter can be used for activating any of inactive interfaces identified using the ifconfig command.

Enabling and disabling networks with ifconfig

You can disable any network by using down rather than u:

sudo ifconfig dummy0 down

This will cause the interface to be unresponsive.

Itconfig is a tool that allows you to configure networks

It is simple to modify any value that is associated with a network interface. Remember to prefix the command sudo, All these changes will require administrators privileges in order to be effective.

Most people use this feature to assign an IP address to their network. Here’s an example of how you can give the dummy0 interface a new address:

sudo ifconfig dummy0

Configuring networks with ifconfig

To assign an IP address, you can use any valid one after the network name. If you enter something wrongly, you will not receive a message. If you enter the wrong information, the message will not be displayed.

It is also possible to specify a netmask as this:

sudo ifconfig dummy0 netmask

Configuring networks with ifconfig

It is very similar to the syntax used for broadcast addresses:

sudo ifconfig dummy0 broadcast

Configuring networks with ifconfig

You can combine the different commands to make it more efficient if you are trying to alter all of these IP addresses within a network. As with most Linux commands you can put multiple arguments on the same line.

Configuring networks with ifconfig

An interface to the network can have one or several aliases. These aliases are defined by the syntax name:x, name The network’s name is x a digit. This is an example: How to add an alias address IP address to the Dummy0 network.

sudo ifconfig dummy0:0

Configuring networks with ifconfig

It can be confirmed that the operation worked using ifconfig.

ifconfig dummy0:0

Configuring networks with ifconfig

What Can You Do with ifconfig Other Than That?

There are many arguments you can use with the ifconfig command to alter other variables on a network connection. You can set MTU and enable multicast.

The official man pages You will find a comprehensive list of arguments you can use in ifconfig along with technical descriptions of each. You can invoke the manual directly from the terminal by using the man ifconfig command.

What else can you do with ifconfig?

When is it appropriate to use ifconfi?

The ifconfig command is not necessary for most users. Normal internet use can be done with the default settings.

If you are a system administrator and need more control over your network interfaces then ifconfig may be the right tool. To properly configure the network interfaces, you can simply use this command to start up your system. After that, it’s easy to forget about.

You can use it to diagnose network problems. It allows you to query any interface on the network and then configure it. Ifconfig can be used to reboot networks and switch technical parameters so that it runs more efficiently.

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