lightsailなイメージでapt updateしようとしたところ、レポジトリエラーになる現象が。
$ sudo apt update Ign:1 http://ap-northeast-1.ec2.archive.ubuntu.com/ubuntu xenial InRelease Ign:2 http://ap-northeast-1.ec2.archive.ubuntu.com/ubuntu xenial-updates InRelease Ign:3 http://ap-northeast-1.ec2.archive.ubuntu.com/ubuntu xenial-backports InRelease Err:4 http://ap-northeast-1.ec2.archive.ubuntu.com/ubuntu xenial Release 404 Not Found [IP: 54.168.13.207 80] Err:5 http://ap-northeast-1.ec2.archive.ubuntu.com/ubuntu xenial-updates Release 404 Not Found [IP: 54.168.13.207 80] Err:6 http://ap-northeast-1.ec2.archive.ubuntu.com/ubuntu xenial-backports Release 404 Not Found [IP: 54.168.13.207 80] Hit:7 http://security.ubuntu.com/ubuntu xenial-security InRelease Reading package lists... Done E: The repository 'http://ap-northeast-1.ec2.archive.ubuntu.com/ubuntu xenial Release' does not have a Release file. N: Updating from such a repository can't be done securely, and is therefore disabled by default. N: See apt-secure(8) manpage for repository creation and user configuration details. E: The repository 'http://ap-northeast-1.ec2.archive.ubuntu.com/ubuntu xenial-updates Release' does not have a Release file. N: Updating from such a repository can't be done securely, and is therefore disabled by default. N: See apt-secure(8) manpage for repository creation and user configuration details. E: The repository 'http://ap-northeast-1.ec2.archive.ubuntu.com/ubuntu xenial-backports Release' does not have a Release file. N: Updating from such a repository can't be done securely, and is therefore disabled by default. N: See apt-secure(8) manpage for repository creation and user configuration details.
なんじゃらほいということで調べてみることにしました。
