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官方發布的或者開源的如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.
下載和系統對應的Logstash的安裝文件，解壓文件。不要把Logstash安裝在一個目錄名包含"："字符的目錄。
On supported Linux operating systems, you can use a package manager to install Logstash.
在linux操作系統上，你可以使用包管理工具來安裝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.
.... 這塊自己看吧
