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hadoop fs -ls
List files and directories in HDFS

hdfs dfs -ls
Alternative syntax to list files and directories

hdfs getconf -confKey
Get configuration information

File Operations

hadoop fs -put
Upload files from local to HDFS

hadoop fs -get
Download files from HDFS to local

hadoop fs -cp
Copy files within HDFS

hadoop fs -mv
Move files within HDFS

hadoop fs -rm
Delete a file from HDFS

hadoop fs -rm -r
Delete a directory recursively

hadoop fs -mkdir
Create a directory in HDFS

hadoop fs -cat
View file content

hadoop fs -tail
View the last part of a file

hadoop fs -touchz
Create an empty file

File System Status

hadoop fs -df -h
Show disk usage with human-readable format

hadoop fs -du -h
Show disk usage for specified files/directories

hadoop fs -count
Count files in directory

hadoop fsck
Check HDFS file system health

hdfs dfsadmin -report
Get overall HDFS status

hdfs dfsadmin -safemode enter|leave|get|wait
Manage safe mode

Permissions & Ownership

hadoop fs -chmod
Change file permissions

hadoop fs -chown :
Change file ownership

hadoop fs -chgrp
Change file group

Quotas & Snapshots

hdfs dfsadmin -setQuota
Set file count quota

hdfs dfsadmin -setSpaceQuota
Set space quota

hdfs dfsadmin -clrQuota
Clear file count quota

hdfs dfsadmin -clrSpaceQuota
Clear space quota

hdfs dfs -createSnapshot
Create snapshot

hdfs dfs -deleteSnapshot
Delete snapshot

Cluster Management

hdfs haadmin -getServiceState
Get HA state of namenode

hdfs haadmin -failover
Initiate failover

hadoop job -list
List running jobs

hadoop job -kill
Kill a running job