./certbot-auto certonly
報錯：
Transaction check error: file /etc/rpm/macros.ghc-srpm from install of redhat-rpm-config-9.1.0-80.el7.centos.noarch conflicts with file from package epel-release-6-8.noarch Error Summary ------------- Could not install OS dependencies. Aborting bootstrap
解決它需要：yum update ;