问题：系统频繁出现下面的信息：
Broadcast message from root@appserver02
Your trial is EXPIRED and no VALID license.
Phone Number: 400-706-1825
E-mail Address: register@cs2c.com.cnd
解决办法：
chmod 600 /usr/libexec/sysnotify
pkill -9 sysnotify
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原文：https://blog.csdn.net/jhkdiy/article/details/78292441
