1、设置免密SSH登录
$ ssh-keygen -t dsa -P ‘‘ -f ~/.ssh/id_dsa $ cat ~/.ssh/id_dsa.pub >> ~/.ssh/authorized_keys $ chmod 0600 ~/.ssh/authorized_keys
Hadoop2.7.2安装笔记
原文：http://www.cnblogs.com/ubosm/p/5538001.html
