Apache 软件下载 http://mirror.bit.edu.cn/apache/
相关文档链接：
Apache Hadoop 2.5.2 http://hadoop.apache.org/docs/r2.5.2/
Apache Hadoop 2.6.0 http://hadoop.apache.org/docs/r2.6.0/
sqoop 1.99.4 wiki 文档 https://cwiki.apache.org/confluence/display/SQOOP/Home
sqoop 1.99.4 文档：https://sqoop.apache.org/docs/1.99.4/index.html