![]() After rebooting check the "sudo" command to ensure it is working properly. So, please reboot the system for the changes to take effect.Ħ. Any changes made in the files do not take effect until the system is rebooted. Please edit the hostname mapped with the IP address "127.0.1.1".ĥ. Hence, it is very important that you edit the hostname in the file. 2 Good day I am using 20.04. listen for TCP/IP connections only on the local loopback address localhost. The "hosts" file maps the hostname to IP addresses. local database user auth-method auth-options host database user address. Check the "/etc/hosts" file and edit the hostname same as in "/etc/hostname". The new hostname should be displayed on the screen.Ĥ. Once you have saved the file with your new hostname, run the command "hostname" to confirm. First, login to root user with the following command: su - root Next, see the content of the /etc/hosts file using the following command: cat /etc/hosts You should see the following screen: As you can see, there is no such record of your hostname (newpc). ![]() ![]() However, you can choose any text editor of your liking.)ģ. (Note: In this case we are using the "vi" editor to edit the file. (Note: You will need root permission to edit the file) You can use the following command to edit the file. sudo apt update sudo: unable to resolve host SrcCodes: Name or service. As an example, I have assigned the hostname as "inspiron-3558". Once hostname is changed, if you get 'unable to resolve host : Name or service not known' then follow the step 4 for the fix.Edit the "/etc/hostname" file in which the hostname is stored in your system. The result will be blank as there is no hostname assigned.Ģ. Check in your hostname by running the command "hostname" on your terminal. Troubleshooting "sudo: unable to resolve host(none)"ġ. It is mapped to the network for communication. Now, add the corresponding statement in the file. In other words, change this line in /etc/nf. Its similar to setting the proxy environment variable, just exclude the export command. I tried everything, like adding my localhost, as specified in /etc/hostname, to the /etc/hosts. but I think when I first installed the bash it worked. ![]() The hostname is stored locally in the file "/etc/hostname". Add the myhostname entry to the hosts service in /etc/nf. rootlocalhost: sudo true sudo: unable to resolve host localhost. Hostname is the name of your device that the network identifies with. networkmode : Add container to a custom network So I have to set this option with my network name in the config.toml like runners. ![]() (note the us-west-2 in the second block versus the us-west-1 in the first), and I no longer got the "unable to resolve host" error.When the terminal is stuck on "sudo: unable to resolve host(none)", it means that you have not provided a hostname to your system. Thanks to Tarun Lalwan link and according to Joyce Babu post, there are an undocumented option from the gitlab runner repos in the runners.docker section. # DO NOT EDIT THIS FILE BY HAND - YOUR CHANGES WILL BE OVERWRITTENĪfter creating a new DHCP option set with domain= and applying that to my VPC, once I restarted my EC2 instance, the nf file looked like this # Dynamic nf(5) file for glibc resolver(3) generated by resolvconf(8) As a result, when the machine was started, the EC2 scripts that set up the machine were putting this into my nf file # Dynamic nf(5) file for glibc resolver(3) generated by resolvconf(8) The DHCP Option Set for my VPC was pointing at us-west-1 but my new VPC was in us-west-2. I had this issue when I copied settings from one availability zone to another. ![]()
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