vagrantでcentos6.7の開発環境の作成をおこなっていたところ 「yum update」でエラーが発生した warning: rpmts_HdrFromFdno: Header V4 RSA/SHA1 Signature, key ID ef8d349f: NOKEY Retrieving key from file:///etc/pki/rpm-gpg/RPM-GPG-KEY-puppetlabs-PC1 The GPG keys listed for the "Puppet Labs PC1 Repository el 6 - x86_64" repository are already installed but they are not correct for this package. Check that the correct key URLs are config