How to assign Static IP address to CentOS virtual machine through command prompt

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 Step 1: Identify the Network Interface

Run the following command to list all network interfaces and their current configurations:

Command- ip a

Identify the name of the interface for which you want to assign a static IP address (e.g., eth0, ens33, etc.).

Step 2: Edit the Network Configuration File

Network interfaces are configured in files located under /etc/sysconfig/network-scripts/. You need to edit the configuration file of the specific network interface.

For example, if the interface is eth0, open its configuration file with:

Command- sudo vi /etc/sysconfig/network-scripts/ifcfg-eth0

Step 3: Modify the Configuration

In the configuration file, you need to ensure that the settings reflect the manual IP address assignment. Update or add the following lines:

TYPE=Ethernet

BOOTPROTO=static

NAME=eth0

DEVICE=eth0

ONBOOT=yes

IPADDR=192.168.1.100    # Replace with your desired IP address

NETMASK=255.255.255.0    # Replace with your appropriate netmask

GATEWAY=192.168.1.1      # Replace with your gateway

DNS1=8.8.8.8             # Replace with your preferred DNS server

Step 4: Restart the Network Service

Once the configuration is updated, restart the network service to apply the changes:

Command-

sudo systemctl restart network

Step 5: Verify the Changes

To ensure the changes were applied, you can check the interface's new configuration using:

ip a

This will show the manually assigned IP address for the interface.







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