2021-09-26 Solved: Certbot: sudo certbot renew --dry-run でエラー Oracle Cloud Infrastructure sudo certbot renew --dry-run Failed to renew certificate xxx.com with error: Some challenges have failed. 上記のエラーが発生した場合、 sudo certbot run -v 2: Renew & replace the certificate 後に sudo certbot renew --dry-run で解決
