1. yum 安装软件报错
    Couldn’t open file /etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7
    Couldn't open file /etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7
  2. 修改/etc/yum.repos.d/epel.repo文件,gpgcheck=1改为gpgcheck=0
    Couldn't open file /etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7
  3. 重新安装就可以了

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