Messaging: two systems connect to a common messaging system and exchange data and invoke behavior using messages.

消息：两个系统连接到一个公用的消息系统，互相交换数据，并利用消息调用行为。

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In a nutshell, syslog allows applications to write tagged messages to a common set of system log files that can reside where it's convenient for the programmers and network administrators to access.

简要地说，syslog允许应用程序将带有标记的消息写入一组公共系统日志文件中，这些日志文件可以驻留在程序员和网络管理员能够轻松访问的位置。

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Log to a separate file: By default, sudo may log to a common messages logfile along with other system messages.

将日志记录到其他文件：默认情况下，sudo可能将日志与其它系统消息一同记录在一个普通的messages日志文件中。

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