How to Fix the "Temporary failure in name resolution" Error?

Encountering the “Temporary failure in name resolution” error can be frustrating, especially when accessing the mạng internet for something urgent. This error typically occurs in Unix-like operating systems such as Linux, indicating that the system struggles lớn resolve a domain name name lớn its corresponding IP address. This guide will provide detailed steps on how lớn fix the “Temporary failure in name resolution” error.

There could be many reasons for what causes the “Temporary failure in name resolution” error. Look below:

Incorrect DNS Configuration

Your system’s DNS settings might be misconfigured. This can cause the “Temporary failure in name resolution” error.

Network Issues

Problems with your network connection can prevent DNS resolution. Hence, the “Temporary failure in name resolution” error can occur.

Firewall or Security Settings

Overly restrictive firewall settings can block DNS requests – welcoming the “Temporary failure in name resolution” error.

DNS Server Issues

The DNS server you are using might be down or experiencing problems. Therefore, the “Temporary failure in name resolution” error.

How lớn Fix the “Temporary failure in name resolution” Error?

Check Your Network Connection

You must be sure that your network connection is active. A simple way lớn test this is by pinging a known IP address, such as Google’s DNS server:

bash

ping 8.8.8.8

If you receive responses, your network connection is working. If not, you need lớn troubleshoot your network connection.

Verify DNS Configuration

The next step is lớn kiểm tra your DNS configuration. The DNS servers your system uses are typically listed in the /etc/resolv.conf tệp tin. Open this tệp tin using a text editor lượt thích nano or vi:

bash

sudo nano /etc/resolv.conf

You should see lines similar lớn this:

plaintext

nameserver 8.8.8.8

nameserver 8.8.4.4

Add or update the nameserver entries if the tệp tin is empty or the DNS servers are incorrect. Google’s public DNS servers (8.8.8.8 and 8.8.4.4) are a good choice for reliable DNS resolution.

Restart the Network Service

After updating the DNS configuration, restart your network service lớn apply the changes. On most Linux distributions, you can bởi this with the following command:

bash

sudo systemctl restart NetworkManager

Alternatively, you can use the service command:

bash

sudo service network-manager restart

Check Firewall Settings

Firewalls can sometimes block DNS traffic. To kiểm tra if your firewall is causing the issue, temporarily disable it and see if the problem is still there. Use the following command lớn disable the firewall on systems using ufw:

bash

sudo ufw disable

If disabling the firewall resolves the issue, you must adjust your firewall rules lớn allow DNS traffic (port 53).

Verify Network Interface Configuration

Incorrect network interface settings can also cause DNS resolution issues. Check your network interface configuration tệp tin, usually located at /etc/network/interfaces or in the /etc/netplan directory on newer distributions lượt thích Ubuntu.

Open the configuration tệp tin and ensure the DNS settings are correctly specified. For example, a typical entry might look lượt thích this:

plaintext

iface eth0 inet static

    address 192.168.1.100

    netmask 255.255.255.0

    gateway 192.168.1.1

    dns-nameservers 8.8.8.8 8.8.4.4

If the DNS settings are missing or incorrect, add or update them accordingly.

Update Your System

Sometimes, the issue can be due lớn a bug in the system’s network components. Be sure your system is updated by running the following commands:

bash

sudo apt update

sudo apt upgrade

This will fetch and install the latest updates for your system, potentially resolving the DNS resolution issue.

Use a Different DNS Resolver

If the problem persists, consider using a different DNS resolver. In addition lớn Google’s DNS, other reliable options include Cloudflare’s DNS (1.1.1.1) and OpenDNS (208.67.222.222). You can specify these DNS servers in the /etc/resolv.conf file:

plaintext

nameserver 1.1.1.1

nameserver 1.0.0.1

Persistent Changes lớn resolv.conf

Changes lớn /etc/resolv.conf can be overwritten by network managers. To make persistent changes, configure the network manager itself. For NetworkManager, you can create a configuration file:

bash

sudo nano /etc/NetworkManager/conf.d/dns.conf

Add the following nội dung lớn specify DNS servers:

plaintext

[main]

dns=none

[global-dns]

nameservers=8.8.8.8;8.8.4.4;

Save and close the tệp tin – then restart NetworkManager:

bash

sudo systemctl restart NetworkManager

Debugging with dig và nslookup

Tools lượt thích dig and nslookup can help diagnose DNS resolution issues. Install these tools if they are not already present:

bash

sudo apt install dnsutils

Use dig lớn query a domain:

bash

dig example.com

Look for the ANSWER SECTION lớn see if the domain name resolves correctly. Similarly, use nslookup:

bash

nslookup example.com

These tools provide detailed output lớn help identify where the resolution process is failing.

Conclusion

The “Temporary failure in name resolution” error can occur due lớn various issues ranging from DNS configuration errors lớn network connectivity problems. Check và adjust your network and DNS settings lớn resolve this error and restore proper name resolution. Remember the points mentioned in this post. Using the correct tools – you can fix this error, no big khuyến mãi.

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