In Ubuntu, you can bind an IP address to a specific network interface and check the network interfaces using various commands. Below are the steps to achieve this:

1. Check Network Interfaces

To list all network interfaces and their configurations, you can use the ip command or ifconfig.

Using ip command:

ip addr show

or

ip a

Using ifconfig (if installed):

ifconfig

2. Bind an IP Address to a Network Interface

Using ip command (temporary):

sudo ip addr add <IP_ADDRESS>/<SUBNET_MASK> dev <INTERFACE_NAME>

Example

sudo ip addr add 192.168.1.100/24 dev eth0

Using netplan (persistent):

Ubuntu uses netplan for network configuration. You can edit the configuration file located in /etc/netplan/

Open the configuration file:

sudo nano /etc/netplan/<configuration_filename.yaml

for BIND A SINGLE IP - Replace

network:
  version: 2
  renderer: networkd
  ethernets:
    eth0:
      addresses:
        - 192.168.1.100/24 #Replace with your primary IP and subnet mask
      gateway4: 192.168.1.1 #Replace with your gateway IP
      nameservers:
        addresses: [8.8.8.8, 8.8.4.4]

for BIND 3 IPS - Replace

network:
  version: 2
  renderer: networkd
  ethernets:
    ens3:
      dhcp4: no
      addresses:
        - 202.124.164.76/24  #Replace with your primary IP and subnet mask
        - 202.124.164.73/24  #Replace with your secondary IP and subnet mask
        - 202.124.164.230/24  #Replace with your tertiary IP and subnet mask
        - 192.168.0.22/24   #Replace with your subnet of your primary IP
        - 192.168.0.10/24 #Replace with your subnet of your secondary IP
        - 192.168.0.198/24  #Replace with your subnet of your tertiary IP
      routes:
        - to: 0.0.0.0/0
          via: 202.124.164.1  #Replace with your gateway IP
      nameservers:
        addresses:
          - 8.8.8.8
          - 8.8.4.4

Apply the changes:

sudo netplan apply

3. Verify the IP Binding

After binding the IP address, you can verify it using the ip or ifconfig command.

Using ip command:

ip addr show dev <INTERFACE_NAME>

Example:

ip addr show dev eth0

Using ifconfig:

ifconfig <INTERFACE_NAME>

Example:

ifconfig eth0

4. Check Network Connectivity

To ensure that the IP binding is working correctly, you can ping another device on the network.

ping <TARGET_IP>

Example:

ping 192.168.1.1

5. Restart Network Service (if needed)

If you encounter any issues, you can restart the network service.

Using systemctl:

sudo systemctl restart networking

Using netplan:

sudo netplan apply

This should now work without indentation errors.