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How to check Hbase health from commandline?

from the hbase home directory:
# ./bin/hbase hbck

Version: 0.90.5

Number of Tables: 1
Number of live region servers: 3
Number of dead region servers: 0
Number of empty REGIONINFO_QUALIFIER rows in .META.: 0
Summary:
  -ROOT- is okay.
    Number of regions: 1
    Deployed on: server1.internal:60020
  .META. is okay.
    Number of regions: 1
    Deployed on: server2.internal:60020
  webpage is okay.
    Number of regions: 41
    Deployed on: server3.internal:60020 server2.internal:60020 server1.internal:60020
0 inconsistencies detected.
Status: OK

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