腳本執行需要root權限，但腳本中使用su命令來執行其他命令或腳本，比如使用nginx用戶調用日誌統計腳本。

在/var/log/message日誌中有過多的日誌顯示

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

嚴重影響message的閱讀和過濾；

計劃將信息重新建立一個文件保存比如/var/log/su

修改/etc/rsyslog.conf

在message條目中添加：

auth.none

增加條目：

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

記得重啟rsyslog生效

systemctl restart rsyslog.service

去掉message日誌文件中su命令的記錄