This is the documentation for CDH 4.6.0.
Documentation for other versions is available at Cloudera Documentation.

Accessing HBase by using the HBase Shell

After you have started HBase, you can access the database by using the HBase Shell:

$ hbase shell
HBase Shell; enter 'help<RETURN>' for list of supported commands.
Type "exit<RETURN>" to leave the HBase Shell
Version: 0.89.20100621+17, r, Mon Jun 28 10:13:32 PDT 2010

hbase(main):001:0> status 'detailed'
version 0.89.20100621+17
0 regionsInTransition
1 live servers
    my-machine:59719 1277750189913
        requests=0, regions=2, usedHeap=24, maxHeap=995
            stores=2, storefiles=0, storefileSizeMB=0, memstoreSizeMB=0, storefileIndexSizeMB=0
            stores=1, storefiles=1, storefileSizeMB=0, memstoreSizeMB=0, storefileIndexSizeMB=0
0 dead servers