Nothing is impossible

问题描述在Ubuntu下启动hadoop的hdfs时出现：hadoop@ubuntu:~/hadoop-2.8.1$ sbin/start-dfs.sh Starting namenodes on [localhost]localhost: ssh: connect to host localhost port 22: Connection refusedlocalhost: ssh: con

1. 读写源码注意加注释的地方！！！/** * App.java */package com.jiecxy;import org.apache.hadoop.conf.Configuration;import org.apache.hadoop.fs.FSDataInputStream;import org.apache.hadoop.fs.FSDataOutputStream;imp