In this article, we will explore the concept of IP addressing and its importance in the Linux environment. We will discuss how IP addresses are used to identify devices on a network, allocate IP addresses in Linux, and configure network interfaces. Additionally, we will provide practical examples and commands specific to the Linux environment.

Examples:
1. Allocating IP Addresses in Linux:

• To allocate a static IP address to a network interface, open the terminal and navigate to the network configuration directory: cd /etc/sysconfig/network-scripts/


• Identify the network interface you want to configure, such as eth0 or ens33, and open the corresponding configuration file using a text editor: vim ifcfg-eth0


• Within the file, modify the BOOTPROTO value to static and add the desired IP address, subnet mask, default gateway, and DNS servers:
  

   BOOTPROTO=static
  
   IPADDR=192.168.1.100
  
   NETMASK=255.255.255.0
  
   GATEWAY=192.168.1.1
  
   DNS1=8.8.8.8
  
   DNS2=8.8.4.4



• Save the changes and restart the network service: systemctl restart network

2. Configuring DHCP in Linux:

• To configure a network interface to obtain an IP address automatically from a DHCP server, open the terminal and navigate to the network configuration directory: cd /etc/sysconfig/network-scripts/


• Open the configuration file for the desired interface: vim ifcfg-eth0


• Change the BOOTPROTO value to dhcp:
  

   BOOTPROTO=dhcp



• Save the changes and restart the network service: systemctl restart network