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An error occurred while upgrading centos 8 patches. RPM-GPG-KEY-EPEL-8 is missing

When upgrading the CentOS 8 system patch, the following error occurred, which prevented the normal upgrade.

centos8升级补丁时 出现报错RPM-GPG-KEY-EPEL-8缺失

Reason: Problem caused by missing RPM-GPG-KEY-EPEL-8 file

Repair method:

cd /etc/pki/rpm-gpg/

wget https://archive.fedoraproject.org/pub/epel/RPM-GPG-KEY-EPEL-8

yum clean all && yum install ShellCheck -y

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