- HBase Tutorial
- HBase - Home
- HBase - Overview
- HBase - Architecture
- HBase - Installation
- HBase - Shell
- HBase - General Commands
- HBase - Admin API
- HBase - Create Table
- HBase - Listing Table
- HBase - Disabling a Table
- HBase - Enabling a Table
- HBase - Describe & Alter
- HBase - Exists
- HBase - Drop a Table
- HBase - Shutting Down
- HBase - Client API
- HBase - Create Data
- HBase - Update Data
- HBase - Read Data
- HBase - Delete Data
- HBase - Scan
- HBase - Count & Truncate
- HBase - Security
- HBase Resources
- HBase - Questions and Answers
- HBase - Quick Guide
- HBase - Useful Resources
HBase - General Commands
The general commands in HBase are status, version, table_help, and whoami. This chapter explains these commands.
status
This command returns the status of the system including the details of the servers running on the system. Its syntax is as follows:
hbase(main):009:0> status
If you execute this command, it returns the following output.
hbase(main):009:0> status 3 servers, 0 dead, 1.3333 average load
version
This command returns the version of HBase used in your system. Its syntax is as follows:
hbase(main):010:0> version
If you execute this command, it returns the following output.
hbase(main):009:0> version 0.98.8-hadoop2, r6cfc8d064754251365e070a10a82eb169956d5fe, Fri Nov 14 18:26:29 PST 2014
table_help
This command guides you what and how to use table-referenced commands. Given below is the syntax to use this command.
hbase(main):02:0> table_help
When you use this command, it shows help topics for table-related commands. Given below is the partial output of this command.
hbase(main):002:0> table_help Help for table-reference commands. You can either create a table via 'create' and then manipulate the table via commands like 'put', 'get', etc. See the standard help information for how to use each of these commands. However, as of 0.96, you can also get a reference to a table, on which you can invoke commands. For instance, you can get create a table and keep around a reference to it via: hbase> t = create 't', 'cf'…...
whoami
This command returns the user details of HBase. If you execute this command, returns the current HBase user as shown below.
hbase(main):008:0> whoami hadoop (auth:SIMPLE) groups: hadoop