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This article is to share with you about the commands to be used to initialize hadoop services. The editor thinks it is very practical, so I share it with you. I hope you can get something after reading this article. Let's follow the editor to have a look.

A simple study of hadoop more than a year ago, the environment centos 6.5 64bit. Use the following command to gradually initialize and save it for your own use.

Cd / optwget http://mirrors.cnnic.cn/apache/hadoop/common/hadoop-2.6.4/hadoop-2.6.4.tar.gztar-xvf hadoop-2.6.4.tar.gz ln-s hadoop-2.6.4 hadoopcp. / etc/hadoop/* inputbin/hadoop jar. / share/hadoop/mapreduce/hadoop-mapreduce-examples-2.6.4.jar grep input output 'dfs [a muri z.] +' cat output/*rpm-ivh http://nginx. Org/packages/centos/6/noarch/RPMS/nginx-release-centos-6-0.el6.ngx.noarch.rpmyum install nginxservice nginx startiptables-I INPUT-p tcp-- dport 80-j ACCEPTservice iptables saveservice iptables restartservice iptables status http://10.132.65.77/hadoop-project-dist/hadoop-common/SingleCluster.htmlssh-keygen-t dsa-P'- f ~ / .ssh/id_dsaiptables-I INPUT-p tcp-- dport 50070-j ACCEPTbin/hdfs dfs-put etc/hadoop / userbin/ Hadoop jar share/hadoop/mapreduce/hadoop-mapreduce-examples-2.6.4.jar grep / user output'dfs [a murz.] + 'bin/hdfs dfs-get output outputbin/hdfs dfs-cat output/*-- this is not workingiptables-I INPUT-p tcp-- dport 8088-j ACCEPTiptables-I INPUT-p tcp-- dport 9000-j ACCEPTiptables-I INPUT-p tcp-dport 50090-j ACCEPTiptables-I INPUT-p tcp-dport 50070-j ACCEPTiptables-I INPUT-p tcp-dport 50010 -j ACCEPTiptables-I INPUT-p tcp-- dport 50075-j ACCEPTiptables-I INPUT-p tcp-- dport 50020-j ACCEPTiptables-I INPUT-p tcp-- dport 8040-j ACCEPTiptables-I INPUT-p tcp-- dport 8042-j ACCEPTiptables-I INPUT-p tcp-- dport 8088-j ACCEPTiptables-I INPUT-p tcp-dport 8030-j ACCEPTiptables-I INPUT-p tcp-dport 8031-j ACCEPTiptables-I INPUT-p tcp-dport 8032-j ACCEPTiptables-I INPUT-p tcp-dport 8033-j dport Bin/hdfs namenode-formatjavac-classpath ${HADOOP_HOME} / hadoop-$ {HADOOP_VERSION}-core.jar-d wordcount_classes WordCount.java above are the commands used to initialize the hadoop service The editor believes that there are some knowledge points that we may see or use in our daily work. I hope you can learn more from this article. For more details, please follow the industry information channel.

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