add alternative

```

git clone https://github.com/rancavil/hadoop-single-node-cluster.git

cd hadoop-single-node-cluster

docker build -t hadoop .

docker run -name myhadoop -p 9864:9864 -p 9870:9870 -p 8088:8088 hadoop

docker exec -it myhadoop bash

hdfs dfs -mkdir /user

hdfs dfs -mkdir /user/hduser

hdfs dfs -ls

hdfs dfs -ls /user/hduser

hdfs dfs -mkdir input

hdfs dfs -ls /user/hduser

echo $HADOOP_HOME

hdfs dfs -put $HADOOP_HOME/etc/hadoop/*.xml input

hdfs dfs -ls /user/hduser/input

hadoop jar $HADOOP_HOME/share/hadoop/mapreduce/hadoop-mapreduce-examples-3.3.3.jar grep input output 'yarn'

hdfs dfs -ls output

hdfs dfs -cat output/*

hdfs dfs -rm input/* output/*

hdfs dfs -rmdir input output

cd examples

sudo apt install python

hdfs dfs -mkdir input

hdfs dfs -put *.txt input

hadoop jar $HADOOP_HOME/share/hadoop/tools/lib/hadoop-streaming-3.3.3.jar -mapper mapper.py -reducer reducer.py -input /user/hduser/input/*.txt -output /user/hduser/output

hdfs dfs -ls output

hdfs dfs -cat output/*

```

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