Logstash requires Java 7 or later. Use the official Oracle distribution or an open-source distribution such as OpenJDK.
logstash需要java7或者更高的版本。使用Oralce官方发布的或者开源的如OpenJDK
Installing from a Downloaded Binary
Download the Logstash installation file that matches your host environment. Unpack the file. Do not install Logstash into a directory path that contains colon (:) characters.
下载和系统对应的Logstash的安装文件，解压文件。不要把Logstash安装在一个目录名包含"："字符的目录。
On supported Linux operating systems, you can use a package manager to install Logstash.
在linux操作系统上，你可以使用包管理工具来安装Logstash。
Installing from Package Repositories
We also have repositories available for APT and YUM based distributions. Note that we only provide binary packages, but no source packages, as the packages are created as part of the Logstash build.
.... 这块自己看吧
