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1.首先添加hosts文件
vim /etc/hosts 10.0.110.56 MSJTVL-DSJC-H01 10.0.110.57 MSJTVL-DSJC-H03 10.0.110.58 MSJTVL-DSJC-H05 10.0.110.60 MSJTVL-DSJC-H02 10.0.110.61 MSJTVL-DSJC-H04
2.几台机器做互信
Setup passphraseless ssh Now check that you can ssh to the localhost without a passphrase: $ ssh localhost If you cannot ssh to localhost without a passphrase, execute the following commands: $ ssh-keygen -t dsa -P ‘‘ -f ~/.ssh/id_dsa $ cat ~/.ssh/id_dsa.pub >> ~/.ssh/authorized_keys
把其他几台机器的秘钥文件复制到MSJTVL-DSJC-H01的authorized_keys文件中
[hadoop@MSJTVL-DSJC-H01 .ssh]$ scp hadoop@MSJTVL-DSJC-H02:/hadoop/.ssh/id_dsa.pub ./id_dsa.pub2 [hadoop@MSJTVL-DSJC-H01 .ssh]$ scp hadoop@MSJTVL-DSJC-H03:/hadoop/.ssh/id_dsa.pub ./id_dsa.pub3 [hadoop@MSJTVL-DSJC-H01 .ssh]$ scp hadoop@MSJTVL-DSJC-H04:/hadoop/.ssh/id_dsa.pub ./id_dsa.pub4 [hadoop@MSJTVL-DSJC-H01 .ssh]$ scp hadoop@MSJTVL-DSJC-H05:/hadoop/.ssh/id_dsa.pub ./id_dsa.pub5 [hadoop@MSJTVL-DSJC-H01 .ssh]$ cat ~/.ssh/id_dsa.pub2 >> ~/.ssh/authorized_keys [hadoop@MSJTVL-DSJC-H01 .ssh]$ cat ~/.ssh/id_dsa.pub3 >> ~/.ssh/authorized_keys [hadoop@MSJTVL-DSJC-H01 .ssh]$ cat ~/.ssh/id_dsa.pub4 >> ~/.ssh/authorized_keys [hadoop@MSJTVL-DSJC-H01 .ssh]$ cat ~/.ssh/id_dsa.pub5 >> ~/.ssh/authorized_keys
以上操作实现了MSJTVL-DSJC-H02,3,4,5对MSJTVL-DSJC-H01的无密码登录
要是实现MSJTVL-DSJC-H01-5的全部互信则把MSJTVL-DSJC-H01上的authorized_keys文件COPY到其他机器上去
[hadoop@MSJTVL-DSJC-H02 ~]$ scp hadoop@MSJTVL-DSJC-H01:/hadoop/.ssh/authorized_keys /hadoop/.ssh/authorized_keys
下载相应的tar包
wget http://apache.fayea.com/hadoop/common/hadoop-2.6.4/hadoop-2.6.4.tar.gz
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原文地址：http://www.cnblogs.com/tian880820/p/5845613.html
