Detailed explanation of the installation process of Hadoop
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Install JDK
Decompress the jdk package
Tar-zxvf / home/hadoop/software/jdk-7u80-linux-x64.tar.gz-C / usr/java/ 1 2
Configure jdk environment variables
Hadoop:root:/usr/java: > vi / etc/profile # / etc/profile # System wide environment and startup programs, for login setup # Functions and aliases go in / etc/bashrc # It's NOT a good idea to change this file unless you know what you # are doing. It's much better to create a custom.sh shell script in # / etc/profile.d/ to make custom changes to your environment, as this # will prevent the need for merging in future updates. # add path export JAVA_HOME=/usr/java/jdk1.7.0_80 export PATH=$JAVA_HOME/bin:$PATH # show path hadoop:root:/usr/java: > source / etc/profilehadoop:root:/usr/java: > java-versionjava version "1.7.0o80" Java (TM) SE Runtime Environment (build 1.7.0_80-b15) Java HotSpot (TM) 64-Bit Server VM (build 24.80-b11 Mixed mode) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 install Hadoop
Decompress Hadoop
Hadoop:hadoop:/home/hadoop/app: > tar-zxvf / home/hadoop/software/hadoop-2.6.0-cdh6.7.0.tar.gz-C / home/hadoop/app/
Configure the environment
Hadoop:hadoop:/home/hadoop: > vi .bash _ profile # .bash _ profile # Get the aliases and functions if [- f ~ / .bashrc]; then. ~ / .bashrc fi # User specific environment and startup programs export HADOOP_HOME=/home/hadoop/app/hadoop-2.6.0-cdh6.7.0 export PATH=$HADOOP_HOME/bin:$HADOOP_HOME/sbin:$PATH hadoop:hadoop:/home/hadoop: > source .bash _ profile hadoop:hadoop:/home/hadoop: > echo $HADOOP_HOME/ home/hadoop/app/hadoop-2.6.0-cdh6.7.0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 formatted Hadoop hdfs namenode-format 1 2
