yumアップデート後
Downloading packages:
warning: /var/cache/yum/x86_64/7/centreon-stable-noarch/packages/centreon-plugins-sudoers-1.0.0-6.el7.centos.noarch.rpm: Header V4 RSA/SHA1 Signature, key ID 3fc49c1b: NOKEY
Retrieving key from file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CES
The GPG keys listed for the "Centreon open source software repository." repository are already installed but they are not correct for this package.
Check that the correct key URLs are configured for this repository.
Failing package is: centreon-plugins-sudoers-1.0.0-6.el7.centos.noarch
GPG Keys are configured as: file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CES
答え1
これを試してみませんか？
rpm --import https://yum-gpg.centreon.com/RPM-GPG-KEY-CES
もう一度お試しください