Hadoop Common Commands

Hadoop Namenode-format formatted Distributed File system
start-all.sh Start all Hadoop daemons
stop-all.sh Stop all Hadoop daemons
start-mapred.sh Start the Map/reduce daemon
stop-mapred.sh Stop Map/reduce Daemon
Start-dfs.sh starting the HDFs daemon
stop-mapred.sh Stop HDFs Daemon
start-balancer.sh HDFS data Block load Balancing

FS in the following command can also be written as a Dfs
Hadoop fs-ls list HDFs files
Hadoop fs-ls [filename] lists files in a document in the HDFs directory
Hadoop fs-put [filename] uploads files to HDFs
Hadoop fs-get [filename] downloads files from HDFs to local
Hadoop FS-RMR [dirname] Delete directory under HDFs
Hadoop fs-cat [filename] View a file under HDFs
Hadoop fs-help List of command lists
Hadoop fs-help [commandname] List specific command details

Hadoop Dfsadmin-report View basic statistics for HDFS
Hadoop Dfsadmin-safemode Enter Safe Mode (default mode)
Hadoop dfsadmin-safemode leave exit Safe mode

Hadoop Common Commands