Ubuntu18.04 Hadoop Standalone

sudo tar -zxvf hadoop-3.1.2.tar.gz -C /usr/local

sudo mv hadoop-3.1.2/ ./hadoop

sudo chown -R hosea ./hadoop/

vim etc/hadoop/hadoop-env.sh

export JAVA_HOME=/usr/lib/jvm/jdk1.8.0_212

./bin/hadoop

mkdir input

cp etc/hadoop/*.xml input

./bin/hadoop jar share/hadoop/mapreduce/hadoop-mapreduce-examples-3.1.2.jar grep input output 'dfs[a-z.]+'

cat output/*

sudo vim /etc/profile

export HADOOP_HOME=/usr/local/hadoop
export PATH=${HADOOP_HOME}/bin:${HADOOP_HOME}/sbin:$PATH

source /etc/profile

hadoop version