http://hadoop.apache.org/ Hadoop from the release page.http://hadoop.apache.org/releases.htmlhttp://www.apache.org/dyn/closer.cgi/hadoop/common/ We suggest the following mirror site for your download:他会推荐一个镜像站点（如果这个不好可以换其他的） cdh有两个大的发行版： http://archive-primary.cloudera.com/cdh4/cdh/4/ http://archive-primary.cloudera.com/cdh5/cdh/5/