脚本执行需要root权限，但脚本中使用su命令来执行其他命令或脚本，比如使用nginx用户调用日志统计脚本。
在/var/log/message日志中有过多的日志显示
计算
安全
数据库
网络和加速
企业服务
Jun 28 10:28:06 localhost su: (to nginx) chuangyw on none
Jun 28 10:28:06 localhost su: (to nginx) chuangyw on none
Jun 28 10:28:06 localhost su: (to nginx) chuangyw on none
Jun 28 10:28:07 localhost su: (to nginx) chuangyw on none
Jun 28 10:28:07 localhost su: (to nginx) chuangyw on none
Jun 28 10:28:07 localhost su: (to nginx) chuangyw on none
Jun 28 10:28:07 localhost su: (to nginx) chuangyw on none
Jun 28 10:28:07 localhost su: (to nginx) chuangyw on none
Jun 28 10:28:07 localhost su: (to nginx) chuangyw on none
Jun 28 10:28:07 localhost su: (to nginx) chuangyw on none
Jun 28 10:28:07 localhost su: (to nginx) chuangyw on none
Jun 28 10:28:07 localhost su: (to nginx) chuangyw on none
Jun 28 10:28:07 localhost su: (to nginx) chuangyw on none
Jun 28 10:28:08 localhost su: (to nginx) chuangyw on none
Jun 28 10:28:08 localhost su: (to nginx) chuangyw on none
Jun 28 10:28:08 localhost su: (to nginx) chuangyw on none
Jun 28 10:28:08 localhost su: (to nginx) chuangyw on none
Jun 28 10:28:08 localhost su: (to nginx) chuangyw on none
Jun 28 10:28:08 localhost su: (to nginx) chuangyw on none
Jun 28 10:28:08 localhost su: (to nginx) chuangyw on none严重影响message的阅读和过滤；
计划将信息重新建立一个文件保存比如/var/log/su
修改/etc/rsyslog.conf
在message条目中添加：
auth.none
增加条目：
auth.* /var/log/su
# Log anything (except mail) of level info or higher.
# Don't log private authentication messages!
*.info;mail.none;authpriv.none;cron.none;auth.none /var/log/messages
# The authpriv file has restricted access.
authpriv.* /var/log/secure
auth.* /var/log/su
# Log all the mail messages in one place.
mail.* -/var/log/maillog记得重启rsyslog生效
systemctl restart rsyslog.service
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