一、nagios 安装
Nagios可以运行在各种版本的linux及主流的unix环境，我的环境有Redhat5.4来部署nagios的。安装完操作系统之后，需要把多余的服务都关掉，只留sshd这个服务。
安装前的准备工作
1.建用户和组
[root@localhost ~]# useradd -m nagios
[root@localhost ~]# groupadd nagcmd
[root@localhost ~]# usermod -a -G nagcmd nagios
[root@localhost ~]# usermod -a -G apache nagios
2.安装：安装过程中会用到的一些服务和软件安装
[root@localhost ~]#yum groupinstall "Development Libraries" "Development Tools" "Legacy Software Development" "X Software Development" -y
[root@localhost ~]# yum install gcc glibc glibc-devel glibc-common gd gd-devel –y
[root@localhost ~]# yum install httpd httpd-devel php -y
3.安装nagios-3.4.1.tar.gz
[root@localhost ~]# tar -zvxf nagios-3.4.1.tar.gz
[root@localhost ~]#cd nagios
[root@localhost nagios]#./configure --prefix=/usr/local/nagios --with-command-group=nagcmd --with-gd-lib=/usr/lib --with-gd- inc=/usr/include ----运行Nagios配置脚本，并 把nagcmd更改为之前所创建的组
[root@localhost nagios]# make all
[root@localhost nagios]# make install
[root@localhost nagios]# make install-init
[root@localhost nagios]# make install-commandmode
[root@localhost nagios]# make install-config
[root@localhost nagios]# make install-webconf
[root@localhost ~]# htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin
--为nagios增添用户nagiosadmin 并设密码。（此时为登录nagiosweb页面而用，并非先前建立的nagios）
[root@localhost ~]# chkconfig --add nagios
[root@localhost ~]# chkconfig nagios on
[root@localhost ~]# chkconfig httpd on
---做的开机启动
二、编译安装Nagios插件nagios-plugins-1.4.16.tar.gz
[root@localhost ~]# tar -zxvf nagios-plugins-1.4.16.tar.gz
[root@localhost ~]# cd nagios-plugins-1.4.16
[root@localhost nagios-plugins-1.4.16]# ./configure --prefix=/usr/local/nagios --with-nagios-user=nagios --with-nagios-group=nagios
[root@localhost nagios-plugins-1.4.16]# make
[root@localhost nagios-plugins-1.4.16]# make install
[root@localhost ~]# service nagios start
Starting nagios: done.
[root@localhost ~]# service httpd start
启动 httpd：[确定]
[root@localhost ~]#
到此时已安安装完。
用ie用测试http://192.168.111.105/nagios 如下图：
