Technology Encyclopedia Home >How to configure network settings on Linux?

How to configure network settings on Linux?

Created on 2025-03-19 14:54:58
4

Configuring network settings on Linux can be done in several ways, depending on the distribution and the specific requirements. Here are some common methods:

1. Using ifconfig and route Commands

The ifconfig command is used to configure network interfaces, and the route command is used to set up routing tables. However, note that ifconfig is part of the net-tools package, which may not be installed by default on some modern Linux distributions.

Example:

sudo ifconfig eth0 192.168.1.100 netmask 255.255.255.0
sudo route add default gw 192.168.1.1

2. Using ip Command

The ip command is a more modern and powerful tool for managing network interfaces and routing.

Example:

sudo ip addr add 192.168.1.100/24 dev eth0
sudo ip route add default via 192.168.1.1

3. Configuring Network Using Configuration Files

Most Linux distributions use configuration files to manage network settings. The location and format of these files can vary.

For Debian/Ubuntu:
Edit the /etc/network/interfaces file.

sudo nano /etc/network/interfaces

Add the following lines:

auto eth0
iface eth0 inet static
    address 192.168.1.100
    netmask 255.255.255.0
    gateway 192.168.1.1

Restart the networking service:

sudo systemctl restart networking

For CentOS/RHEL:
Edit the configuration file in /etc/sysconfig/network-scripts/.

sudo nano /etc/sysconfig/network-scripts/ifcfg-eth0

Add or modify the following lines:

BOOTPROTO=static
IPADDR=192.168.1.100
NETMASK=255.255.255.0
GATEWAY=192.168.1.1
ONBOOT=yes

Restart the network service:

sudo systemctl restart network

4. Using Network Manager

Network Manager is a graphical tool that can also be managed from the command line using nmcli.

Example:

sudo nmcli con add type ethernet ifname eth0 ip4 192.168.1.100/24 gw4 192.168.1.1
sudo nmcli con up eth0

Using Tencent Cloud Services

If you are managing a virtual machine on Tencent Cloud, you can use the Tencent Cloud Console to configure network settings. Tencent Cloud provides a Virtual Private Cloud (VPC) service that allows you to create and manage virtual networks. You can configure IP addresses, subnets, and security groups through the Tencent Cloud Console.

Steps:

  1. Log in to the Tencent Cloud Console.
  2. Navigate to the VPC service.
  3. Create or select a VPC and subnet.
  4. Launch a CVM (Cloud Virtual Machine) in the selected subnet.
  5. Configure the network settings within the CVM using the methods described above.

Using Tencent Cloud's VPC service ensures secure and flexible network configurations for your Linux instances.