Invalid GPG keys: warning: rpmts HdrFromFdno: Header V3_DSA signature: NOKEY

Sometimes you encountered problem that fail to install the package after you execute yum install . Below the error that you encountered

Downloading Packages:
warning: rpmts_HdrFromFdno: Header V3 DSA signature: NOKEY, key ID db42a60e


Public key for autoconf-2.59-5.noarch.rpm is not installed

This errors occurs sometime with yum install with the old GPG keys that are obsolete, you need to update them . Just run the command below to update the old GPG keys.

rpm --import /etc/pki/rpm-gpg/RPM*