Nagios是一个监视系统运行状态和网络信息的监视系统。Nagios能监视所指定的本地或远程主机以及服务，同时提供异常通知功能等
Nagios可运行在Linux/Unix平台之上，同时提供一个可选的基于浏览器的WEB界面以方便系统管理人员查看网络状态，各种系统问题，以及日志等等。
4.0.2发布。2013-11-25.上个版本是2013-10-16的4.0.1,有几个增强和Bug修正 Nagios Plugins也发布了1.5的版本 Nagios Core遗留稳定版是2013-08-30的3.5.1
完全改进：
4.0.2 - 11/25/2013 ------------------ FIXES * Fixed bug 528: Nagios 4.0.1: Logrotation: Only current host- and servicestates saved in rotated logfiles (duplicate of 507) * Fixed bug 507: Nagios 4.0.0 - Problem during log rotate (Stefano Ghelfi) * Fixed bug 530: RPM spec file sets wrong permissions on plugins directory (duplicate of bug 494) * Fixed bug 494: nagios.spec fixes (with patch) (Karsten Weiss) * Fixed bug 515: Segsegv after starting up nagios (duplicate of bug 526) * Fixed bug 513: Crash while entering downtime for service (duplicate of bug 526) * Fixed bug 529: Core Worker failed to reap child in 4.0.1 Description * Fixed bug 514: scheduled downtime not showing in web interface (Eric Stanley) * Fixed bug 526: sort_downtime() corrupts scheduled_downtime_list causing segfault (Adam James) * Fixed bug 492: Nagios 4 fails to remove/add checks upon reload (Eric Stanley) * Fixed Bug 484: Beta4.0.0b4 service checks returning (No output on stdout) (Eric Stanley) * Fixed Bug 470: statusmap doesn't display info (Cameron Moore) * Fixed Bug 499: Security issue in daemon-init.in, function check_config (Tómas Edwardsson)
下载：http://jaist.dl.sourceforge.net/project/nagios/nagios-4.x/nagios-4.0.2/nagios-4.0.2.tar.gz
