Essential Hadoop HDFS Commands Well Explained | Kundan Kumar |

In this video, we delve into the fundamental commands of Hadoop's HDFS (Hadoop Distributed File System) to help you manage and interact with your data efficiently. Whether you're a beginner or looking to sharpen your skills, this tutorial will guide you through the most important HDFS commands you'll need to know.
What You'll Learn:
1. Introduction to HDFS Commands: Understand the basics of HDFS and its role in the Hadoop ecosystem.
2. Listing Files and Directories: Learn how to use the hdfs dfs -ls , hdfs dfs -lsr, hdfs dfs -ls -R command to list files and directories and directory tree.
3. File Operations: Explore commands like hdfs dfs -put, hdfs dfs -get, and hdfs dfs -copyFromLocal to manage file transfers.
4. Directory Operations: Discover how to create and delete directories using hdfs dfs -mkdir and hdfs dfs -rm -r.
5. File System Checks: Understand how to check the health of your HDFS using hdfs fsck and other related commands.
Thank you for watching, and let's embark on this journey to mastering Hadoop together!

[@chris-cd5li]

this is a a well explained tutorial i have ever seen thank you for sharing knowledge sir

[@kundankumar011]

Pleasure is mine dear to share the knowledge. Welcome ❤️

[@ishimwejoshua2766]

This is a fabulous tutorial indeed. please keep on giving us informative tutorials.

[@kundankumar011]

I am glad to know that this video tutorial was informative. Thank you dear @Joshua❤

[@pamellamutoniingabire]

Great tutorial indeed!This was so helpful.clear and concise. Thanks alot for sharing

[@kundankumar011]

Pleasure to know that this tutorial was so helpful and Thank you so much for saying this is one of the great tutorials dear. ❤️

[@EmmaBemmly]

The sign before the direction to put or copy to is changing from forward backslash to backward backslash . 😅

[@kundankumar011]

Dear Emmanuel. If I am getting you well. Are you talking about the slash sign. Like hdfs dfs -put C:\example\demo.txt /Kumar/.
1) Source we are reading the data from local machine from windows. So windows style slash
2) Destination - we are uploading to HDFS so another style slash
Hope I didn't confuse you dear. Keep learning 🥰

[@PhilemonIransubije]

I found this difference:
-put: Can copy from local file systems or from other compatible file systems (like S3) to HDFS.
-copyFromLocal: Specifically designed to copy from the local file system to HDFS
also,
-put: By default, it will overwrite the destination if the file already exists.
-copyFromLocal: Will throw an error if the file already exists at the destination
However, "-put" supports more options and flags for advanced use cases

[@kundankumar011]

Cool. Thank you so much for the contribution dear❤️ that's what I need people should contribute in video comment

[@PhilemonIransubije]

Sir, after uploading a file, it is creating 1 replication for it. i changed the hdfs-site to 2, but no change. any help?

[@kundankumar011]

Okay, dear. Do one thing to confirm this issue. Since you changed the replication factor, if I am not mistaken, it will only affect new data uploads, not the old data already in HDFS. So, just upload some new data to HDFS and see if it shows a replication factor of 2. Let me know if it works dear.

[@PhilemonIransubije]

@@kundankumar011 it works for new uploads. thanks :)