hadoop启动时为什么要输入密码

[pipstat@PIPtest58 hadoop]$ sbin/start-all.sh
This script is Deprecated. Instead use start-dfs.sh and start-yarn.sh
16/03/15 20:10:15 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Starting namenodes on [press5.cn]
[email protected]'s password:
press5.cn: starting namenode, logging to /data1/home/pipstat/yarn/hadoop/logs/hadoop-pipstat-namenode-PIPtest58.out
192.168.0.55: starting datanode, logging to /data1/home/pipstat/yarn/hadoop/logs/hadoop-pipstat-datanode-Gametest55.out
Starting secondary namenodes [0.0.0.0]
[email protected]'s password:
0.0.0.0: starting secondarynamenode, logging to /data1/home/pipstat/yarn/hadoop/logs/hadoop-pipstat-secondarynamenode-PIPtest58.out
16/03/15 20:10:42 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
starting yarn daemons
starting resourcemanager, logging to /data1/home/pipstat/yarn/hadoop/logs/yarn-pipstat-resourcemanager-PIPtest58.out
192.168.0.55: starting nodemanager, logging to /data1/home/pipstat/yarn/hadoop/logs/yarn-pipstat-nodemanager-Gametest55.out


解决方案
免费密码登录：本机免费登录本机，即ssh localhost能正常登录才成