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Nagios Core Overview Nagios Core 概况
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More information about Nagios Core - including features and technical specifications can be found online at www.nagios.org/about/.
更多的关于Nagios Core信息包括特征和技术说明能够到http://www.nagios.org/about/上在线获取。
What Is Nagios Core? 什么是Nagios Core?
Nagios Core is an Open Source system and network monitoring application. It watches hosts and services that you specify, alerting you when things go bad and when they get better.
Nagios Core was originally designed to run under Linux, although it should work under most other unices as well.
Nagios Core 是一个开源的系统和网络监控应用。它监控你指定的主机和服务，当有事情变坏或变好的时候给你发出通知。Nagios被设计运行在Linux系统下面，通常它在多数类UNIX操作系统下也能工作得很好。
Some of the many features of Nagios Core include:
Nagios Core的一些特征：
Monitoring of network services (SMTP, POP3, HTTP, NNTP, PING, etc.)
监控网络服务
Monitoring of host resources (processor load, disk usage, etc.)
监控主机资源
Simple plugin design that allows users to easily develop their own service checks
可以很容易的设计简单的插件来检查用户自己的特定服务
Parallelized service checks
并行服务检查
Ability to define network host hierarchy using "parent" hosts, allowing detection of and distinction between hosts that are down and those that are unreachable
通过“parent”host来定义不同层次的网络主机，能够很容易的监测出主机宕机同主机不可达之间的区别。
Contact notifications when service or host problems occur and get resolved (via email, pager, or user-defined method)
当服务或主机出问题或问题被解决的时候给联系人发出通知 （电子邮件，短信，或自定义的通知方法）
Ability to define event handlers to be run during service or host events for proactive problem resolution
通过自定义事件句柄，在服务或主机事件发生期间提前解决问题
Automatic log file rotation
自动日志文件循环
Support for implementing redundant monitoring hosts
支持冗余监控主机的实现
Optional web interface for viewing current network status, notification and problem history, log file, etc.
可通过web监控观察当前网络状态、通知和问题历史，日志文件等
System Requirements 系统要求
The only requirement of running Nagios Core is a machine running Linux (or UNIX variant) that has network access and a C compiler installed (if installing from source code).
在Linux机器上运行Nagios Core仅仅要求具备网络访问与安装有C编译器的条件。
You are not required to use the CGIs included with Nagios Core. However, if you do decide to use them, you will need to have the following software installed...
使用 CGI不是安装Nagios Core 的必要条件，不过你如果需要使用它们，你必须安装以下软件：
A web server (preferrably Apache)。
一台Web服务器
Thomas Boutell's gd library version 1.6.3 or higher (required by the statusmap and trends CGIs)。
gd 库，版本为1.6.3或更高。
Licensing
Nagios Core is licensed under the terms of the GNU General Public License Version 2 as published by the Free Software Foundation. This gives you legal permission to copy, distribute and/or modify Nagios under certain conditions. Read the 'LICENSE' file in the Nagios distribution or read the online version of the license for more details.
Nagios Core 使用自由软件基金会公布的GNU General Public License Version 2 许可，在特定条件下你可以合法进行复制，分发或修改 Nagios 。更多细节请阅读Nagios的'LICENSE'文件。
Nagios Core is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE WARRANTY OF DESIGN, MERCHANTABILITY, AND FITNESS FOR A PARTICULAR PURPOSE.
Nagios Core不提供任何形式的担保与保证。
Acknowledgements 致谢
Several people have contributed to Nagios Core by either reporting bugs, suggesting improvements, writing plugins, etc. A list of some of the many contributors to the development of Nagios Core can be found in the THANKS file in the root of the Nagios Core distribution.
少数人为Nagios Core捐献，同时报告bugs，建议，编写插件等等。在THANKS文件中可以找到为Nagios Core开发做出过贡献的人。
Downloading The Latest Version 下载最新版本
You can check for new versions of Nagios Core at https://www.nagios.org/download.