# java -XshowSettings:properties -version 2>&1 > /dev/null | grep ‘java.home’ java.home = /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.161-0.b14.el7_4.x86_64/jre set JAVA_HOME in ./etc/hadoop(hadoop-env.sh From hadoop installation directory $ ./bin/hadoop jar share/hadoop/mapreduce/hadoop-mapreduce-examples-3.0.0.jar wordcount input output output directory should not exist before running…