3. Copy the Configuration Files

Replace the installed Hadoop configs with the modified core_hadoop configuration files and set appropriate permissions.

rm -rf $HADOOP_CONF_DIR
mkdir -p $HADOOP_CONF_DIR

<Copy all the modified configuration files in core_hadoop to $HADOOP_CONF_DIR on all nodes>

chmod a+x $HADOOP_CONF_DIR/
chown -R $HDFS_USER:$HADOOP_GROUP $HADOOP_CONF_DIR/../
chmod -R 755 $HADOOP_CONF_DIR/../

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