OSSEC安装结束后运行,运行以下命令却抛错 cat /opt/ossec/logs/alerts/alerts.log 具体抛错内容: ** Alert 1468897672.2164786: mail - syslog,errors, Jul :: localhost->/var/log/httpd/error_log Rule: (level ) -> 'Unknown problem somewhere in the system.' [Tue Jul ::] [:error] [pi…