Some users are reporting that sudo is not resolving hostnames correctly. This can be a problem after changing the computer’s name, as sudo is unable to find the IP address of the new hostname. This is an easy issue to solve - just follow these steps:
- Check that your network settings are correct.
- Make sure that your computer’s name is entered correctly in /etc/hosts and /etc/resolv.conf.
- If you’re using a VPN, make sure that the VPN server is listed in /etc/resolv.conf as well. ..
Steps to Fix Unable to Resolve Host Error on Linux
The hostname change was the primary cause of the Cannot resolve hostname error. I will demonstrate how to resolve this hostname cannot be resolved error.
Next, use nslookup to lookup the IP address of your system. In our case, the IP address is 192.168.1.100. Finally, use ping to test connectivity between your system and the Internet. In our case, the result is successful. ..
The hostname is taken from the /etc/hosts file.
The hostname should be listed in the /etc/hosts file as well.
The system is not able to determine the hostname, which results in an error message stating ‘sudo: unable to resolve host’. ..
To fix this, edit this file and add a new line and set the loopback address with the hostname. You can use Vim to edit files on the command line. To fix this, edit this file and add a new line and set the loopback address with the hostname. You can use Vim to edit files on the command line.
If your old hostname still exists in your /etc/hosts file, you should replace it with the new hostname.
Final Words
Linux is a freely accessible operating system that is simple to use and has many features that are not available on other systems. If you are a programmer and have some knowledge of system programming and operating systems, you can use Linux to meet your needs. The community can contribute new features to Linux, making it even more versatile and useful.
