大部分的Linux系统会启动sshd(安全Shell服务)、syslog(系统日志工具)和lpd(打印服务)，但还会有更多的服务需要启动。

Most Linux systems will start SSHD (the SecureShell service), syslog (system logging facility), and LPD (printing service), but there could be many more.

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清单5显示了一个Linux系统，其中意外地删除了Apache日志，我正使用grep工具查找是否有人打开了该文件。

Listing 5 shows a Linux system where an Apache log has accidentally been deleted, and I am using the grep tool to find out if anyone has it open.

youdao

这在集成已有遗留系统监测工具时很有用处，这些工具提供了对日志文件的连续扫描功能以产生警告并监测事故。

This is useful in the integration with existing legacy system monitoring tools that offer continuous scanning of log files in order to raise alerts and detect incidents.

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