如何安装和设置NagiosCore。

安装和设置Nagios Core的步骤如下：

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1、系统要求

操作系统：Linux（推荐使用CentOS、Ubuntu等）

数据库：MySQL或PostgreSQL

Web服务器：Apache或Nginx

2、安装依赖库和软件包

更新系统软件包列表

“`

sudo yum update y

“`

安装必要的依赖库和软件包

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sudo yum install y gcc gccc++ make ncursesdevel openssldevel perl wget netsnmpdevel libcurldevel postgresqldevel mysqldevel

“`

3、下载Nagios Core源码

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wget https://assets.nagios.com/downloads/nagioscore/releases/nagios4.4.6.tar.gz

“`

4、解压源码包并进入目录

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tar zxvf nagios4.4.6.tar.gz

cd nagios4.4.6

“`

5、编译和安装Nagios Core

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./configure withcommandgroup=admin withcommandname=status withconfig=/etc/nagios withlogfile=/var/log/nagios3/nagios.log withstatedir=/var/lib/nagios3 withlockfile=/var/run/nagios3/nagios.pid withplugins=1 withopenssl=1 witheventhandlers=1 withperlmodules=1 withmysql=1 withpgsql=1 withnetsnmp=1 withmailer=sendmail withmta=postfix

make all

sudo make install

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6、创建Nagios用户和组

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sudo groupadd nagcmd

sudo useradd g nagcmd d /usr/local/nagios3 s /bin/bash nagios3

sudo passwd nagios3

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7、配置Nagios Core

创建配置文件目录并复制默认配置文件

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sudo mkdir /etc/nagios3

sudo cp p conf/* /etc/nagios3/

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编辑配置文件/etc/nagios3/nagios.cfg，设置以下参数：

“`

…

define host{…} # 定义主机和服务监控规则

define service{…} # 定义服务监控规则

define command{…} # 定义命令执行脚本

…

“`

初始化数据库表结构

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sudo nagios3 v /etc/nagios3/nagios.cfg d /usr/local/nagios3/var/db/nagios3 c /usr/local/nagios3/etc/objects/commands.cfg c /usr/local/nagios3/etc/objects/contacts.cfg c /usr/local/nagios3/etc/objects/hosts.cfg c /usr/local/nagios3/etc/objects/services.cfg c /usr/local/nagios3/etc/objects/timeperiods.cfg c /usr/local/nagios3/etc/objects/templates.cfg c /usr/local/nagios3/etc/objects/events.cfg c /usr/local/nagios3/etc/objects/eventhandlers.cfg c /usr/local/nagios3/etc/objects/logfiles.cfg c /usr/local/nagios3/etc/objects/hostdependencies.cfg c /usr/local/nagios3/etc/objects/servicedependencies.cfg c /usr/local/nagios3/etc/objects/hostextinfo.cfg c /usr/local//nagios3//etc//objects//serviceextinfo.cfg c /usr//local//nagios3//etc//objects//hostgroupmemberships.cfg c /usr//local//nagios3//etc//objects//servicegroupmemberships.cfg c /usr//local//nagios3//etc//objects//hostgroups.cfg c /usr//local//nagios3//etc//objects//servicegroups.cfg c /usr//local//nagios3//etc//objects//hostaliases.cfg c /usr//local//nagios3//etc//objects//servicealiases.cfg c /usr//local//nagios3//etc//objects//generichoststatusobjectdefinitions.cfg c /usr//local//nagios3//etc//objects//genericservicestatusobjectdefinitions.cfg c /usr//local//nagios3//etc//objects//genericservicedependencyobjectdefinitions.cfg c /usr//local//nagios3//etc//objects//generichostdependencyobjectdefinitions.cfg c /usr//local//nagios3//etc//objects//genericcontactgroupmembershipobjectdefinitions.cfg c /usr//local//nagios3//etc//objects//genericcontactgroupobjectdefinitions.cfg c /usr//local//nagios3 //etc //objects //genericcontactobjectdefinitions.cfg c /usr //local //nagio