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hadoop version

adduser hadoop

yum install -y passwd sudo

passwd hadoop

chown -R hadoop /usr/local/hadoop

root    ALL=(ALL)       ALL

hadoop  ALL=(ALL)       ALL

docker stop hadoop_single
docker commit hadoop_single hadoop_proto

docker run -d --name=hdfs_single --privileged hadoop_proto /usr/sbin/init

docker exec -it hdfs_single su hadoop

whoami

ssh-keygen -t rsa

ssh-copy-id [email protected]

ip addr | grep 172

cd $HADOOP_HOME/etc/hadoop

<property>
    <name>fs.defaultFS</name>
    <value>hdfs://&lt;your IP>:9000</value>
</property>

<property>
    <name>dfs.replication</name>
    <value>1</value>
</property>

hdfs namenode -format

start-dfs.sh

# Display files and subdirectories in the root directory /, absolute path
hadoop fs -ls /
# Create a folder, absolute path
hadoop fs -mkdir /hello
# Upload a file
hadoop fs -put hello.txt /hello/
# Download a file
hadoop fs -get /hello/hello.txt
# Output file content
hadoop fs -cat /hello/hello.txt