Hadoop是运行在Linux系统下的，但我们在Windows下Eclipse远程访问Hadoop HDFS时，如果两个机子地址不在同一网段便无法相互访问。
Windows测试是否可远程连接，只需Dos 执行ping即可。
为了统一网段，势必要对虚拟机设置网络地址：
1.root账户登录，修改interfaces
hadoop@HADOOP:~$ su root
Password:
root@HADOOP:/home/hadoop# vi /etc/network/interfaces
文件修改参考如下（按主机网段修改）：
address 192.168.3.137
gateway 192.168.3.1
netmask 255.255.255.0
2.修改hosts
root@HADOOP:/home/hadoop# vi /etc/hosts
文件修改参考如下（按主机网段修改）：
127.0.0.1 localhost
127.0.1.1 Ubuntu
192.168.3.137 HADOOP.MAIN
192.168.1.135 HADOOP.SLAVE
192.168.1.136 HADOOP.SLAVE2
# The following lines are desirable for IPv6 capable hosts
::1 ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
注意两个地址要保持一致
3.ifconfig查看配置信息是否正确
hadoop@HADOOP:~$ ifconfig
eth0 Link encap:Ethernet HWaddr 00:0c:29:42:d4:51
inet addr:192.168.3.137 Bcast:192.168.3.255 Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fe42:d451/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:29 errors:0 dropped:0 overruns:0 frame:0
TX packets:73 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:2531 (2.5 KB) TX bytes:12238 (12.2 KB)
Interrupt:19 Base address:0x2024
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:24 errors:0 dropped:0 overruns:0 frame:0
TX packets:24 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:1884 (1.8 KB) TX bytes:1884 (1.8 KB)
4.在Windows Dos下执行 ping+地址 命令，查看是否连接成功
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CentOS 6.4下Hadoop 0.20.2安装实录
Ubuntu 12.10 +Hadoop 1.2.1版本集群配置
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