Describes the cause and action for error messages.
Error Message(English)：
unable to resolve host ip
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/
AWS error - sudo: unable to resolve host ip-10-0-xx-xx - Stack Overflow
https://stackoverflow.com/questions/33441873/aws-error-sudo-unable-to-resolve-host-ip-10-0-xx-xx/334・・・
AWSで「unable to resolve host」と「DNSが変換できない」時やったこと ...
http://blog.tstylestudio.com/2012/12/09/aws%E3%81%A7%E3%80%8Cunable-to-resolve-host%E3%80%8D%E3%81%A・・・
dns - EC2 sudo unable to resolve host - Ask Ubuntu
https://askubuntu.com/questions/946412/ec2-sudo-unable-to-resolve-host
AWS error - sudo: unable to resolve host ip-10-0 ... - CODE Q&A Solved
http://code.i-harness.com/en/q/1fe4851
fixing sudo 'unable to resolve host' error leads to various ...
https://www.linuxquestions.org/questions/linux-server-73/fixing-sudo-%27unable-to-resolve-host%27-er・・・
unable to resolve host, EC2 fail ・ Issue #58 ・ debops/ansible-sshd ...
https://github.com/debops/ansible-sshd/issues/58
Amazon EC2インスタンスのデスクトップ環境を操作する ... - akiyoko blog
http://akiyoko.hatenablog.jp/category/Ubuntu
作業メモ: AWS EC2でUbuntu Server 16.04を起動してDockerを ...
https://2502.net/install-docker-on-ubuntu-server-16-04-on-aws-ec2/