Hadoop environment Setup (Linux standalone edition)

I. Create Hadoop user portfolio under Ubuntu Hadoop user

1. Create a Hadoop user group      addgroup HADOOP2, create a Hadoop user      adduser-ingroup Hadoop hadoop3, Add permissions      VIM/ETC/SUDOERS4 to Hadoop users, switch to Hadoop users      su-hadoop two, SSH installation and setup 1, install ssh  & nbsp   sudo apt-get Install Openssh-server2, start service      SUDO/ETC/INIT.D/SSH Start3, view startup      ps-e | grep ssh4, set password-free login, generate private key with public key      SSH-KEYGEN-T rsa-p ""       This will generate two files under/home/hadoop/.ssh: ID _rsa and Id_rsa.pub, the former is the private key, the latter is the public key.       Appends the public key to Authorized_keys, which saves all public key content that allows the user to log on to the SSH client as the current user.      cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys5, ssh login      SSH Localhost6, Sign out      exit install Java Environment 1, install java     sudo apt-get install OPENJDK-7-JDK2, view Java version   & nbsp  java-version3, view Java installation path      update-alternative--config Javaiv. installation of hadoop2.7.11. Download hadoop2.7.1.tar.gz2, Decompression:sudo tar xzf hadoop-2.7.1.tar.gz     3, copy to: sudo mv hadoop-2.7.1 /usr/local/hadoop     4, permissions settings: sudo chmod 774/usr/local/hadoop     5, config. bashrc file          # HADOOP VARIABLES start          Export java_home=/usr/lib/jvm/java-7-openjdk-amd64          export hadoop_install=/usr/local/hadoop          Export path= $PATH: $ hadoop_install/bin          export path= $PATH: $HADOOP _install/sbin        & nbsp Export hadoop_mapred_home= $HADOOP _install          Export hadoop_common_home= $HADOOP _install           export hadoop_hdfs_home= $HADOOP _install          Export Yarn_h Ome= $HADOOP _install          Export hadoop_common_lib_native_dir= $HADOOP _install/lib/native           Export HADOOP_OPts= "-djava.library.path= $HADOOP _install/lib"               #HADOOP VARIABLES END      6, environment variable effective           source ~/.bashrc    7, edit/usr/local/hadoop /etc/hadoop/hadoop-env.sh      Five, validation test      1,/usr/local/hadoop path Create input folder     2, copy README.txt to input     3, execute wordcount         bin/hadoop jar Share/ Hadoop/mapreduce/sources/hadoop-mapreduce-examples-2.4.0-sources.jar Org.apache.hadoop.examples.WordCount Input　 output      VI. results presentation    

Hadoop environment Setup (Linux standalone edition)