Github unable to resolve host

Describes the cause and action for error messages.

Error Message(English)：
unable to resolve host

Resolution

Ubuntuで sudo: unable to resolve host ip-x-x-x-x が出たら | Libra ...
https://tech.librastudio.co.jp/index.php/2017/03/09/post-1322/

Error "sudo: unable to resolve host" happens on sudo calls on ... - GitHub
https://github.com/Microsoft/WSL/issues/491

"sudo: unable to resolve host odroid" when using sudo ・ Issue ... - GitHub
https://github.com/longsleep/snappy-odroidc/issues/2

"unable to resolve host" message when using sudo ・ Issue ... - GitHub
https://github.com/ideascube/ansiblecube/issues/13

munged does not work on IPv6-only hosts - unable to resolve host ...
https://github.com/dun/munge/issues/20

オブジェクトの保存ができません。。。 ・ Issue #363 ・ NIFCloud ... - GitHub
https://github.com/NIFCloud-mbaas/UserCommunity/issues/363

Unable to Resolve Host using a auto branch merge script on Travis ...
https://stackoverflow.com/questions/49074188/unable-to-resolve-host-using-a-auto-branch-merge-script・・・

github - Unable to Resolve Host using a auto branch merge script on ...
https://stackoverflow.com/questions/49074188/unable-to-resolve-host-using-a-auto-branch-merge-script・・・

chef - ようへいの日々精進XP
http://inokara.hateblo.jp/category/chef?page=1379616416