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Hadoop basic commands
This document provides an overview of basic Hadoop commands for interacting with the Hadoop Distributed File System (HDFS). It lists commands for creating directories, listing files, copying data between local and HDFS, copying within HDFS, viewing file contents, deleting files, getting help for commands, and viewing HDFS through a web browser. Contact information is provided at the end for additional support.
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Hadoop basic commands
- 1. Hadoop Basics commands Agenda Createdirectory on HDFS List your directories/files on HDFS Copy data from local FS to HDFS Copy data from HDFS to local FS Copy data from HDFS to HDFS View content of a file on HDFS Delete data from HDFS Get help for HDFS commands All Hadoop commands All Hadoop dfs commands View HDFS on browser View your data on Browser
- 2. Create directory onHDFS ./hadoop dfs -mkdir /input_files List your directories/files on HDFS ./hadoop dfs -ls << HDFS path >>
- 3. Copy data fromLocal FS to HDFS ./hadoop dfs -copyFromLocal <<local path>> <<HDFS path>> Copy data from HDFS to local FS ./hadoop dfs -copyToLocal <<HDFS path>> <<local path>>
- 4. Copy data fromHDFS to HDFS ./hadoop dfs -cp << HDFS path >> << HDFS path >> View content of a file on HDFS ./hadoop dfs -cat <<HDFS file path>>
- 5. Delete data fromHDFS ./hadoop dfs -rm << HDFS file path Get help for HDFS commands ./hadoop dfs -help << HDFS command
- 6. Hadoop commands ./hadoop Hadoop DFScommands ./hadoop dfs
- 7. View HDFS onbrowser visit localhost:50070 Click on your directory
- 8. View your dataon Browser Thanks Contact Point :- www.bispsolutions.com