https://labs.play-with-docker.com に接続できなかったのでメモ

ssh-keygen -q -t ed25519 -P "" -f ~/.ssh/id_ed25519

PowerShell

ssh-keygen -q -t ed25519 -P '""' -f $HOME/.ssh/id_ed25519

SSHキーを作成すると接続できるようになります。

SSHキーを作成しないとエラーPermission denied (publickey)になります。

ssh ip172-18-0-115-ceg41f63tccg009vkarg@direct.labs.play-with-docker.com
The authenticity of host 'direct.labs.play-with-docker.com (40.121.45.0)' can't be established.
RSA key fingerprint is SHA256:vCbhEjmYQhtNzuuuh7TmGAPfe9T+JdGnGaVquQJUphY.
This key is not known by any other names
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added 'direct.labs.play-with-docker.com' (RSA) to the list of known hosts.
ip172-18-0-115-ceg41f63tccg009vkarg@direct.labs.play-with-docker.com: Permission denied (publickey).