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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, 2016 Jul 19 11:07:52 localhost->/var/log/httpd/error_log Rule: 1002 (level 2) -> ‘Unknown problem somewhere in the system.‘ [Tue Jul 19 11:07:50.911154 2016] [:error] [pid 7373] [client 192.168.129.1:54054] PHP Warning: date(): It is not safe to rely on the system‘s timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone ‘UTC‘ for now, but please set date.timezone to select your timezone. in /var/www/html/analogi/detail.php on line 547, referer: http://192.168.129.128/analogi/
It is not safe to rely on the system解决方法,其实就是时区设置不正确造成的,
解决方法就是在/etc/php.ini里加上找到date.timezone项，
设置date.timezone = "Asia/Shanghai"，重启环境就ok了。
PHP Warning: date(): It is not safe to rely on the system's timezone settings.
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原文地址：http://www.cnblogs.com/tdcqma/p/5684853.html
