{"id":20236,"date":"2023-07-21T07:15:33","date_gmt":"2023-07-21T07:15:33","guid":{"rendered":"https:\/\/webhostinggeeks.com\/howto\/?p=20236"},"modified":"2023-10-24T07:23:06","modified_gmt":"2023-10-24T07:23:06","slug":"how-to-rescan-network-interfaces-on-ubuntu","status":"publish","type":"post","link":"https:\/\/webhostinggeeks.com\/howto\/how-to-rescan-network-interfaces-on-ubuntu\/","title":{"rendered":"How to Rescan Network Interfaces on Ubuntu"},"content":{"rendered":"

\"How<\/p>\n

Server administrators often find themselves needing to manage and adjust network configurations. One common task is rescanning network interfaces, especially after making changes to the hardware or software configurations. Ubuntu, a popular Linux distribution, provides tools and commands to facilitate this.<\/p>\n

This guide will walk you through the steps to rescan network interfaces on Ubuntu<\/a>, ensuring your system recognizes and operates with the latest configurations.<\/p>\n

Let’s get started.<\/p>\n

Step 1: Check Current Network Interfaces<\/h2>\n

Before making any changes, it’s wise to check the current state of your network interfaces.<\/p>\n

\r\nsudo ip addr show\r\n<\/pre>\n
This command will display a list of all network interfaces on your Ubuntu system, along with their current configurations.<\/p>\n
Step 2: Rescan Network Interfaces<\/h2>\n
To rescan network interfaces, you can restart the networking service:<\/p>\n
\r\nsudo systemctl restart networking\r\n<\/pre>\n
This command will restart the networking service, causing Ubuntu to rescan and recognize any changes made to the network interfaces.<\/p>\n
Step 3: Verify Changes<\/h2>\n
After rescanning, you should verify that the changes have been recognized:<\/p>\n
\r\nsudo ip addr show\r\n<\/pre>\n
Compare the output with the initial state to ensure that the desired changes have taken effect.<\/p>\n
Step 4: Troubleshoot If Necessary<\/h2>\n
If you notice any discrepancies or if an interface is not recognized, ensure that the hardware connections are secure and that the interface is correctly configured in the system’s settings.<\/p>\n
Step 5: Ensure Persistence Across Reboots<\/h2>\n
Changes made to network interfaces might not persist after a system reboot. To ensure they do:<\/p>\n
Edit the \/etc\/network\/interfaces file:<\/p>\n
\r\nsudo nano \/etc\/network\/interfaces\r\n<\/pre>\n
Add or modify the necessary configurations for your network interface.<\/p>\n
Save and exit the file.<\/p>\n
Restart the networking service:<\/p>\n
\r\nsudo systemctl restart networking\r\n<\/pre>\n
Commands Mentioned<\/h2>\n