#实现云主机自身使用root用户ssh访问hadoop000免密登陆
搭建环境
vim /etc/hosts hostnamectl set-hostname hadoop000 bash ssh hadoop000 hdfs namenode -format start-all.sh jps systemctl start mysqld.service schematool -dbType mysql -initSchema hive
hdfs操作
创建路径
上传
#创建文件，删除， hadoop fs -mkdir HDFS://phonemodel hdfs dfs -mkdir -p /phonemodel/usergender hadoop fs -touchz /phonemodel/userage/part-r-00000 hadoop fs -rm -r /phonemodel/userage/000000_0 hadoop fs -cat /phonemodel/userage/* #-r删除文件 #上传-f强制覆盖 hadoop fs -put -f /root/phonemodel/gender_age_train.csv /phonemodel/ hadoop fs -put /root/phonemodel/phone_brand_device_model.csv /phonemodel/ hadoop fs -put /root/demo/part-r-00000 /phonemodel/usergender/ hadoop fs -put /root/1/part-r-00000 /phonemodel/agegender/ #究极版 hadoop fs -mkdir -p /phonemodel/agegender && hadoop fs -put /root/1/part-r-00000 /phonemodel/agegender/ /r