为什么安装它？
这得说那坑爹的 Intel® Collaboration Suite for WebRTC，按照官方参考安装之后无法启动，提示：
# bin/start-all.sh
starting nuve, stdout -> /home/Release-v3.1/logs/woogeen-nuve.stdout
starting cluster-manager, stdout -> /home/Release-v3.1/logs/woogeen-cluster-manager.stdout
2016-09-12 10:28:30.091 - ERROR: AMQPER - Connection error... { [Error: connect ECONNREFUSED 127.0.0.1:5672]
code: 'ECONNREFUSED',
errno: 'ECONNREFUSED',
syscall: 'connect',
address: '127.0.0.1',
port: 5672 }
Error: connect ECONNREFUSED 127.0.0.1:5672
at Object.exports._errnoException (util.js:849:11)
at exports._exceptionWithHostPort (util.js:872:20)
at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1060:14)
starting portal, stdout -> /home/Release-v3.1/logs/woogeen-portal.stdout
2016-09-12 10:28:31.429 - ERROR: AMQPER - Connection error... { [Error: connect ECONNREFUSED 127.0.0.1:5672]
code: 'ECONNREFUSED',
errno: 'ECONNREFUSED',
syscall: 'connect',
address: '127.0.0.1',
port: 5672 }
Error: connect ECONNREFUSED 127.0.0.1:5672
at Object.exports._errnoException (util.js:849:11)
at exports._exceptionWithHostPort (util.js:872:20)
at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1060:14)
starting webrtc-agent, stdout -> /home/Release-v3.1/logs/woogeen-webrtc-agent.stdout
2016-09-12 10:28:32.690 - ERROR: AMQPER - Connection error... { [Error: connect ECONNREFUSED 127.0.0.1:5672]
code: 'ECONNREFUSED',
errno: 'ECONNREFUSED',
syscall: 'connect',
address: '127.0.0.1',
port: 5672 }
Error: connect ECONNREFUSED 127.0.0.1:5672
at Object.exports._errnoException (util.js:849:11)
at exports._exceptionWithHostPort (util.js:872:20)
at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1060:14)
starting rtsp-agent, stdout -> /home/Release-v3.1/logs/woogeen-rtsp-agent.stdout
2016-09-12 10:28:33.750 - ERROR: AMQPER - Connection error... { [Error: connect ECONNREFUSED 127.0.0.1:5672]
code: 'ECONNREFUSED',
errno: 'ECONNREFUSED',
syscall: 'connect',
address: '127.0.0.1',
port: 5672 }
Error: connect ECONNREFUSED 127.0.0.1:5672
at Object.exports._errnoException (util.js:849:11)
at exports._exceptionWithHostPort (util.js:872:20)
at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1060:14)
starting recording-agent, stdout -> /home/Release-v3.1/logs/woogeen-recording-agent.stdout
2016-09-12 10:28:35.070 - ERROR: AMQPER - Connection error... { [Error: connect ECONNREFUSED 127.0.0.1:5672]
code: 'ECONNREFUSED',
errno: 'ECONNREFUSED',
syscall: 'connect',
address: '127.0.0.1',
port: 5672 }
Error: connect ECONNREFUSED 127.0.0.1:5672
at Object.exports._errnoException (util.js:849:11)
at exports._exceptionWithHostPort (util.js:872:20)
at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1060:14)
starting audio-agent, stdout -> /home/Release-v3.1/logs/woogeen-audio-agent.stdout
2016-09-12 10:28:36.379 - ERROR: AMQPER - Connection error... { [Error: connect ECONNREFUSED 127.0.0.1:5672]
code: 'ECONNREFUSED',
errno: 'ECONNREFUSED',
syscall: 'connect',
address: '127.0.0.1',
port: 5672 }
Error: connect ECONNREFUSED 127.0.0.1:5672
at Object.exports._errnoException (util.js:849:11)
at exports._exceptionWithHostPort (util.js:872:20)
at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1060:14)
starting video-agent, stdout -> /home/Release-v3.1/logs/woogeen-video-agent.stdout
2016-09-12 10:28:37.639 - ERROR: AMQPER - Connection error... { [Error: connect ECONNREFUSED 127.0.0.1:5672]
code: 'ECONNREFUSED',
errno: 'ECONNREFUSED',
syscall: 'connect',
address: '127.0.0.1',
port: 5672 }
Error: connect ECONNREFUSED 127.0.0.1:5672
at Object.exports._errnoException (util.js:849:11)
at exports._exceptionWithHostPort (util.js:872:20)
at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1060:14)
starting app, stdout -> /home/Release-v3.1/logs/woogeen-app.stdout明明依赖 RabbitMQ ，但在依赖项中没有列出，结果就跑不起来。
什么是MQ？
MQ全称为Message Queue, 消息队列（MQ）是一种应用程序对应用程序的通信方法。应用程序通过读写出入队列的消息（针对应用程序的数据）来通信，而无需专用连接来链接它们。消息传递指的是程序之间通过在消息中发送数据进行通信，而不是通过直接调用彼此来通信，直接调用通常是用于诸如远程过程调用的技术。排队指的是应用程序通过 队列来通信。队列的使用除去了接收和发送应用程序同时执行的要求。
查看系统版本
# cat /etc/redhat-release CentOS Linux release 7.2.1511 (Core)
安装 Erlang
yum install erlang
下载 rabbitmq
wget https://github.com/rabbitmq/rabbitmq-server/releases/download/rabbitmq_v3_6_5/rabbitmq-server-3.6.5-1.noarch.rpm可能不容易下载成功，你可以使用其它下载工具来下载；
安装 rabbitmq
# rpm --import https://www.rabbitmq.com/rabbitmq-release-signing-key.asc 以上命令执行后没有任何输出，接着执行下面的安装命令： # yum install rabbitmq-server-3.6.5-1.noarch.rpm
# yum install rabbitmq-server-3.6.5-1.noarch.rpm 已加载插件：fastestmirror, langpacks 正在检查 rabbitmq-server-3.6.5-1.noarch.rpm: rabbitmq-server-3.6.5-1.noarch rabbitmq-server-3.6.5-1.noarch.rpm 将作为 rabbitmq-server-3.3.5-23.el7.noarch 的更新 正在解决依赖关系 --> 正在检查事务 ---> 软件包 rabbitmq-server.noarch.0.3.3.5-23.el7 将被 升级 ---> 软件包 rabbitmq-server.noarch.0.3.6.5-1 将被 更新 --> 正在处理依赖关系 socat，它被软件包 rabbitmq-server-3.6.5-1.noarch 需要 Loading mirror speeds from cached hostfile * base: mirrors.btte.net * epel: ftp.jaist.ac.jp * extras: mirrors.cn99.com * updates: mirrors.cn99.com --> 正在检查事务 ---> 软件包 socat.x86_64.0.1.7.2.2-5.el7 将被 安装 --> 解决依赖关系完成 依赖关系解决 =============================================================================================================================================================================================== Package 架构 版本 源 大小 =============================================================================================================================================================================================== 正在更新: rabbitmq-server noarch 3.6.5-1 /rabbitmq-server-3.6.5-1.noarch 5.9 M 为依赖而安装: socat x86_64 1.7.2.2-5.el7 base 255 k 事务概要 =============================================================================================================================================================================================== 安装 ( 1 依赖软件包) 升级 1 软件包 总计：6.2 M 总下载量：255 k Is this ok [y/d/N]: y Downloading packages: socat-1.7.2.2-5.el7.x86_64.rpm | 255 kB 00:00:00 Running transaction check Running transaction test Transaction test succeeded Running transaction 正在安装 : socat-1.7.2.2-5.el7.x86_64 1/3 Redirecting to /bin/systemctl stop rabbitmq-server.service 正在更新 : rabbitmq-server-3.6.5-1.noarch 2/3 清理 : rabbitmq-server-3.3.5-23.el7.noarch 3/3 验证中 : socat-1.7.2.2-5.el7.x86_64 1/3 验证中 : rabbitmq-server-3.6.5-1.noarch 2/3 验证中 : rabbitmq-server-3.3.5-23.el7.noarch 3/3 作为依赖被安装: socat.x86_64 0:1.7.2.2-5.el7 更新完毕: rabbitmq-server.noarch 0:3.6.5-1 完毕！
启动服务
rabbitmq 安装后默认不是以后台进程的方式启动的，要想使 rabbitmq 在系统启动时默认以后台进程的方式启动，请以管理员身份执行以下命令：chkconfig rabbitmq-server on
以管理员身份，启动或停止服务通常使用以下命令：
/sbin/service rabbitmq-server stop /sbin/service rabbitmq-server start你可能会遇到以下错误，点击链接查看解决方法：
Failed to start LSB: Enable AMQP service provided by RabbitMQ broker
小结
参考官方帮助：http://www.rabbitmq.com/install-rpm.html
只要英语不是很烂，参考官方帮助安装起来还是很简单的！
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