Ubuntu wired connection not working 20.04 is a common issue many users face. It can be frustrating, especially when you need a stable internet connection for work or entertainment.
Having a stable internet connection is crucial for Ubuntu users. It enables seamless online browsing, downloading, and uploading of files. Thus, fixing the issue of the Ubuntu wired connection not working 20.04 is essential for optimal system performance and user experience.
Table of Contents
1. Check the Hardware
A. Checking the Ethernet Cable: The first step in troubleshooting Ubuntu wired connection not working 20.04 is to check the Ethernet cable. Ensure it is properly connected to your computer and router/modem. If it is damaged, replace it with a new one.
B. Checking Network Card: If the Ethernet cable is in good condition, check the network card. Make sure it is properly installed and functioning correctly. You can do this by running a hardware test or checking the device manager. If the network card is faulty, replace it with a new one.
2. Check Network Settings
A. Check Network Settings in Ubuntu 20.04: If the hardware is not the issue, check the network settings in Ubuntu 20.04. Go to the Network Settings app and verify that the Ethernet connection is enabled. Also, ensure that the correct network is selected.
B. Verify IP address and DNS settings: Verify that the IP address and DNS settings are correctly configured. If the settings are incorrect, change them to match the network requirements. You can obtain the correct settings from your network administrator or Internet Service Provider.
3.Restart Network Services
A. Restart Network Manager: Restarting the Network Manager service can help fix Ubuntu wired connection not working 20.04. Open the terminal and run the command “sudo systemctl restart NetworkManager” to restart the service.
B. Restart Network Interfaces: If restarting the Network Manager does not solve the problem, try restarting the network interfaces. Open the terminal and run the command “sudo ifdown eth0” followed by “sudo ifup eth0” to restart the network interface. Replace “eth0” with the name of your network interface.
4. Update Network Drivers
A. Check for available driver updates: Outdated network drivers can cause Ubuntu wired connection not working 20.04. Check for available driver updates using the “Software & Updates” app or run the command “sudo apt-get update” in the terminal.
B. Install latest network drivers: Install the latest ones by running the command “sudo apt-get install linux-generic” in the terminal. This command installs the latest generic kernel which includes the latest network drivers. After installation, restart your computer and check if the wired connection works correctly.
5. Disable IPV6
A. Understanding IPV6: Internet Protocol version 6 (IPV6) is a network protocol that enables communication between devices on the internet. However, some networks do not support IPV6, which can cause Ubuntu wired connection not working 20.04.
B. Disabling IPV6: To disable IPV6, open the terminal and run the command “sudo nano /etc/sysctl.conf” to edit the system configuration file. Add the following lines at the end of the file:
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1
Save the file and run the command “sudo sysctl -p” to apply the changes. Restart your computer and check if the wired connection is working correctly.
6. Clear DNS Cache
A. Understanding DNS Cache: Domain Name System (DNS) cache stores website IP addresses for faster access. However, sometimes the cache can become corrupted, causing Ubuntu wired connection not working 20.04.
B. Clearing DNS Cache: To clear the DNS cache, open the terminal and run the command “sudo systemd-resolve –flush-caches”. This command clears the DNS cache, allowing your system to fetch the correct website IP addresses. Restart your computer and check if the wired connection is working correctly.
7. Disable Firewall
A. Understanding Firewall: A firewall is a network security system that monitors and controls incoming and outgoing network traffic. However, sometimes it can block network traffic, causing Ubuntu wired connection not working 20.04.
B. Disabling Firewall: To disable the firewall, open the terminal and run the command “sudo ufw disable”. This command disables the Uncomplicated Firewall (UFW), the default firewall in Ubuntu. After disabling the firewall, check if the wired connection is working correctly. If it is, re-enable and configure the firewall to allow network traffic.
Conclusion
In conclusion, Ubuntu wired connection not working 20.04 can be caused by various factors, including hardware issues, network settings, outdated drivers, IPV6, DNS cache, and firewall. Following the seven best ways this guide outlines can fix the problem and get your wired connection working correctly. However, if none of the solutions work, you may need to seek the assistance of a professional network administrator or consult Ubuntu forums for additional support.
FAQ’s
What should I do if my wired connection is not working in Ubuntu 20.04?
If your wired connection is not working in Ubuntu 20.04, you can try several solutions including checking hardware, network settings, restarting network services, updating network drivers, disabling IPV6, clearing DNS cache, and disabling the firewall.
Why is my wired connection not working in Ubuntu 20.04?
Your wired connection may not be working in Ubuntu 20.04 due to various reasons including faulty hardware, incorrect network settings, outdated drivers, issues with IPV6, corrupted DNS cache, or a misconfigured firewall.
How can I update my network drivers in Ubuntu 20.04?
To update your network drivers in Ubuntu 20.04, you can use the “Software & Updates” app to check for available updates or run the command “sudo apt-get install linux-generic” in the terminal to install the latest generic kernel which includes the latest network drivers.
Can disabling the firewall fix the wired connection issue in Ubuntu 20.04?
Yes, disabling the firewall can fix the wired connection issue in Ubuntu 20.04. Sometimes the firewall can block network traffic, causing the wired connection not to work correctly.
What should I do if none of the solutions fix my wired connection issue in Ubuntu 20.04?
If none of the solutions fix your wired connection issue in Ubuntu 20.04, you may need to seek the assistance of a professional network administrator or consult Ubuntu forums for additional support.
