1、问题1

localhost: starting namenode, logging to /usr/local/hadoop/logs/hadoop-hadoop-na                                                                                        menode-ubuntu-1.outhadoop@localhost's password:localhost: Connection closed by UNKNOWNStarting secondary namenodes [0.0.0.0]hadoop@0.0.0.0's password:

参考:

hadoop安装及配置说明 

http://blog.csdn.net/linghe301/article/details/9184453

单机安装：

http://freewxy.iteye.com/blog/1027569