安装zabbix的时候有报错，需要使用附件的包。 Error Downloading Packages: OpenIPMI-devel-2.0.16-14.el6.x86_64: failure: Packages/OpenIPMI-devel-2.0.16-14.el6.x86_64.rpm from c6-media: [Errno 256] No more mirrors to try. libssh2-devel-1.4.2-2.el6_7.1.x86_64: failur