Shulou(Shulou.com)06/02 Report--

Under CentOS

1. Install linux

2. Install jdk

[root@Cent0S1 ~] # javac / / display information

[root@Cent0S1 ~] # rpm-qa | grep jdk / / check whether there is an installation package

[root@Cent0S1 ~] # which java / / View Java command location

/ usr/bin/java

[root@Cent0S1 ~] # javac-version / / View Java version

Javac 1.8.0_191

[root@Cent0S1 ~] # ls-l / usr/bin/java / / View soft connection

Lrwxrwxrwx. 1 root root 22 December 27 15:09 / usr/bin/java-> / etc/alternatives/java

[root@Cent0S1 ~] # ls-l / etc/alternatives/java / / View the jdk directory

Lrwxrwxrwx. 1 root root 73 December 27 15:09 / etc/alternatives/java-> / usr/lib/jvm/java-1.8.0-openjdk-1.8.0.191.b12-1.el7_6.x86_64/jre/bin/java

[root@Cent0S1 ~] # find-name libjvm.so 2 > / dev/null / / View jdk directory method 2

/ usr/lib/jvm/java-1.7.0-openjdk-1.7.0.171-2.6.13.2.el7.x86_64/jre/lib/amd64/server/libjvm.so

/ usr/lib/jvm/java-1.8.0-openjdk-1.8.0.191.b12-1.el7_6.x86_64/jre/lib/amd64/server/libjvm.so

3. Add java environment variables.

[root@Cent0S1 ~] # vi / etc/profile

Export JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.191.b12-1.el7_6.x86_64/

Export JRE_HOME=$JAVA_HOME/jre

Export CLASSPARH=$JACA_HOME/lib:$JRE_HOME/lib:$CLASSPATH

Export PATH=$JAVA_HOME/bin:$JRE_HOME/bin:$PATH

[root@Cent0S1 ~] # source / etc/profile / / the environment takes effect

[root@Cent0S1 Desktop] # mv hadoop-2.7.6 / opt

4. Add hadoop environment variables.

[root@Cent0S1 hadoop] # pwd

/ opt/hadoop-2.7.6/etc/hadoop

[root@Cent0S1 hadoop] vim hadoop-env.sh / / modify JAVA_HOME

JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.191.b12-1.el7_6.x86_64/

[root@Cent0S1 hadoop] # vim core-site.xml

Hadoop.tmp.dir

/ hadoop

Dfs.name.dir

/ hadoop/name # configure home path

Fs.default.name

Hdfs://Cent0S1:9000 # Cent0S1 is the host name

[root@Cent0S1 hadoop] # vim hdfs-site.xml

Dfs.name.dir

/ hadoop/name # configure home path

[root@Cent0S1 hadoop] # vim mapred-site.xml.template

Mapred.job.tracker

Cent0S1:9000

[root@Cent0S1 ~] # vi / etc/profile

Export HADOOP_HOME=/opt/hadoop-2.7.6

Export PATH=$JAVA_HOME/bin:$JRE_HOME/bin:$PATH:$HADOOP_HOME/bin

5. Format hadoop namenode

[root@Cent0S1 bin] # hadoop namenode-format

[root@Cent0S1 sbin] #. / start-all.sh / / enable hadoop

[root@Cent0S1 sbin] # jps / / check whether hadoop is running properly

22945 NameNode

23089 DataNode

23845 Jps

23430 ResourceManager

23722 NodeManager

Under 23278 SecondaryNameNodeCentOS

1. Install linux

2. Install jdk

[root@Cent0S1 ~] # javac / / display information

[root@Cent0S1 ~] # rpm-qa | grep jdk / / check whether there is an installation package

[root@Cent0S1 ~] # which java / / View Java command location

/ usr/bin/java

[root@Cent0S1 ~] # javac-version / / View Java version

Javac 1.8.0_191

[root@Cent0S1 ~] # ls-l / usr/bin/java / / View soft connection

Lrwxrwxrwx. 1 root root 22 December 27 15:09 / usr/bin/java-> / etc/alternatives/java

[root@Cent0S1 ~] # ls-l / etc/alternatives/java / / View the jdk directory

Lrwxrwxrwx. 1 root root 73 December 27 15:09 / etc/alternatives/java-> / usr/lib/jvm/java-1.8.0-openjdk-1.8.0.191.b12-1.el7_6.x86_64/jre/bin/java

[root@Cent0S1 ~] # find-name libjvm.so 2 > / dev/null / / View jdk directory method 2

/ usr/lib/jvm/java-1.7.0-openjdk-1.7.0.171-2.6.13.2.el7.x86_64/jre/lib/amd64/server/libjvm.so

/ usr/lib/jvm/java-1.8.0-openjdk-1.8.0.191.b12-1.el7_6.x86_64/jre/lib/amd64/server/libjvm.so

3. Add java environment variables.

[root@Cent0S1 ~] # vi / etc/profile

Export JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.191.b12-1.el7_6.x86_64/

Export JRE_HOME=$JAVA_HOME/jre

Export CLASSPARH=$JACA_HOME/lib:$JRE_HOME/lib:$CLASSPATH

Export PATH=$JAVA_HOME/bin:$JRE_HOME/bin:$PATH

[root@Cent0S1 ~] # source / etc/profile / / the environment takes effect

[root@Cent0S1 Desktop] # mv hadoop-2.7.6 / opt

4. Add hadoop environment variables.

[root@Cent0S1 hadoop] # pwd

/ opt/hadoop-2.7.6/etc/hadoop

[root@Cent0S1 hadoop] vim hadoop-env.sh / / modify JAVA_HOME

JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.191.b12-1.el7_6.x86_64/

[root@Cent0S1 hadoop] # vim core-site.xml

Hadoop.tmp.dir

/ hadoop

Dfs.name.dir

/ hadoop/name # configure home path

Fs.default.name

Hdfs://Cent0S1:9000 # Cent0S1 is the host name

[root@Cent0S1 hadoop] # vim hdfs-site.xml

Dfs.name.dir

/ hadoop/name # configure home path

[root@Cent0S1 hadoop] # vim mapred-site.xml.template

Mapred.job.tracker

Cent0S1:9000

[root@Cent0S1 ~] # vi / etc/profile

Export HADOOP_HOME=/opt/hadoop-2.7.6

Export PATH=$JAVA_HOME/bin:$JRE_HOME/bin:$PATH:$HADOOP_HOME/bin

5. Format hadoop namenode

[root@Cent0S1 bin] # hadoop namenode-format

[root@Cent0S1 sbin] #. / start-all.sh / / enable hadoop

[root@Cent0S1 sbin] # jps / / check whether hadoop is running properly

22945 NameNode

23089 DataNode

23845 Jps

23430 ResourceManager

23722 NodeManager

23278 SecondaryNameNode

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