安装：
环境：CentOS6.0 32bit
1、先相关软件包
yum install httpd php gcc glibc glibc-common gd gd-devel make
2、创建用户信息
useradd -m nagios passwd nagios groupadd nagcmd usermod -a -G nagcmd nagios usermod -a -G nagcmd apache
3、下载naiogs和nagios-plugins
wget http://prdownloads.sourceforge.net/sourceforge/nagios/nagios-3.3.1.tar.gz wget http://prdownloads.sourceforge.net/sourceforge/nagiosplug/nagios-plugins-1.4.15.tar.gz
4、编译和安装nagios
tar zxf nagios-3.3.1.tar.gz cd nagios ./configure --with-command-group=nagcmd make all make install make install-init make install-config make install-commandmode
5、编辑配置文件（先修改下email地址）
vim /usr/local/nagios/etc/objects/contacts.cfg
6、配置web界面及登陆验证
make install-webconf htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin 创建web登陆到帐号密码 /etc/init.d/httpd restart
7.安装和编译nagios-plugins
tar zxf nagios-plugins-1.4.15.tar.gz cd nagios-plugins-1.4.15 ./configure --with-nagios-user=nagios --with-nagios-group=nagios make make install
8、启动nagios
chkconfig --add nagios chkconfig nagios on /etc/init.d/nagios start
9、检查nagios示例配置文件是否正确：
/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
其他问题：
在make installl时如果出现如下错误：
/usr/bin/install: omitting directory `includes/rss/extlib' /usr/bin/install: omitting directory `includes/rss/htdocs' /usr/bin/install: omitting directory `includes/rss/scripts' make[1]: *** [install] Error 1 make[1]: Leaving directory `/usr/src/nagios/html' make: *** [install] Error 2
执行以下命令：
sed -i 's:for file in includes/rss/*;:for file in includes/rss/*.*;:g' ./html/Makefile sed -i 's:for file in includes/rss/extlib/*;:for file in includes/rss/extlib/*.*;:g' ./html/Makefile
重新make install即可