[root@suibian nagios]# yum install gcc glibc glibc-common gd gd-devel xinetd openssl-devel

[root@suibian nagios]# useradd -s /sbin/nologin nagios

[root@suibian nagios]# mkdir /usr/local/nagios

[root@suibian nagios]# chown -R nagios.nagios /usr/local/nagios/

[root@suibian nagios]# wget http://prdownloads.sourceforge.net/sourceforge/nagios/nagios-3.4.3.tar.gz

[root@suibian nagios]# tar zxvf nagios-3.4.3.tar.gz

[root@suibian nagios]# cd nagios

[root@suibian nagios]# ./configure –prefix=/usr/local/nagios/

[root@suibian nagios]# make all

[root@suibian nagios]# make install

[root@suibian nagios]# make install-init

[root@suibian nagios]#  make install-commandmode

[root@suibian nagios]# make install-config

[root@suibian nagios]# chkconfig –add nagios

[root@suibian nagios]# chkconfig nagios on

[root@suibian nagios]# chkconfig –list nagios
nagios          0:关闭  1:关闭  2:启用  3:启用  4:启用  5:启用  6:关闭

[root@suibian nagios]#  wget http://prdownloads.sourceforge.net/sourceforge/nagiosplug/nagios-plugins-1.4.16.tar.gz

[root@suibian nagios]# tar zxvf nagios-plugins-1.4.16.tar.gz

[root@suibian nagios]# cd nagios-plugins-1.4.16

[root@suibian nagios-plugins-1.4.16]# ./configure –prefix=/usr/local/nagios/

[root@suibian nagios-plugins-1.4.16]# make && make install

[root@suibian conf]# vi /usr/local/apache2/conf/httpd.conf

User daemon
Group daemon
修改为
User nagios
Group nagios

最后变添加上
#setting for nagios
ScriptAlias /nagios/cgi-bin “/usr/local/nagios/sbin”
<Directory “/usr/local/nagios/sbin”>
     AuthType Basic
     Options ExecCGI
     AllowOverride None
     Order allow,deny
     Allow from all
     AuthName “Nagios Access”
     AuthUserFile /usr/local/nagios/etc/htpasswd             //用于此目录访问身份验证的文件
     Require valid-user
</Directory>
Alias /nagios “/usr/local/nagios/share”
<Directory “/usr/local/nagios/share”>
     AuthType Basic
     Options None
     AllowOverride None
     Order allow,deny
     Allow from all
     AuthName “nagios Access”
     AuthUserFile /usr/local/nagios/etc/htpasswd
     Require valid-user
</Directory>

[root@suibian conf]# /usr/local/apache2/bin/htpasswd -c /usr/local/nagios/etc/htpasswd nagios
New password:
Re-type new password:
Adding password for user nagios  我设置的是123456

http://192.168.0.152/nagios/

登陆发现是英文 ，我的英文不好，只好装汉化包 。。。

[root@suibian nagios]# wget http://sourceforge.net/projects/nagios-cn/files/nagios-cn-3.2.3.tar.bz2

[root@suibian nagios]# tar jxvf nagios-cn-3.2.3.tar.bz2

[root@suibian nagios]# cd nagios-cn-3.2.3

[root@suibian nagios-cn-3.2.3]# ./configure –prefix=/usr/local/nagios/

[root@suibian nagios-cn-3.2.3]# make all

[root@suibian nagios-cn-3.2.3]# make install

启动nagios 如下报错
[root@suibian local]# service nagios restart
Running configuration check…done.
Stopping nagios: done.
Starting nagios:This account is currently not available.
 done.

[root@suibian local]# vi /etc/passwd
修改为如下信息
nagios:x:502:502::/home/nagios:/bin/bash

/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg

没问题了，nagios可以启动了，但是登陆上，发现提示：

无权查看任何主机的信息。 请检查HTTP服务器关于该CGI的访问权限设置。
搜索了一下方法
确保 htpasswd.user的所有组为nagios
解决办法：
vi /usr/local/nagios/etc/cgi.cfg
将use_authentication的值改为0.
use_authentication=0
然后重启nagios服务
service nagios restart 可以正常监控了！