yum 安裝時錯誤 Couldn't resolve host 解決辦法
修改/etc/resolv.conf 添加：nameserver 8.8.8.8 ...
原文：Zabbix郵件告警提示Couldn't resolve host name解決辦法
zabbix設置好郵件告警，當有觸發時郵件未發送 查看zabbix server日志，提示不能連接郵件發送服務器，但是ping是可以通的 ...
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