about gpdb password md5，gpdbmd5
gtlions=# alter user gtlions password 'gtlions';
ALTER ROLE
gtlions=# select * from pg_shadow;
usename | usesysid | usecreatedb | usesuper | usecatupd | userepl | passwd | valuntil | useconfig
---------+----------+-------------+----------+-----------+---------+-------------------------------------+----------+-----------
gtlions | 10 | t | t | t | t | md56c7d333ce7a7f5882bdc5a232c107d81 | |
(1 row)
gtlions=# \q
gtlions:~ gtlions$ python
Python 2.7.6 (default, Sep 9 2014, 15:04:36)
[GCC 4.2.1 Compatible Apple LLVM 6.0 (clang-600.0.39)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import hashlib
>>> password = 'md5' + hashlib.md5("gtlionsgtlions").hexdigest()
>>> password
'md56c7d333ce7a7f5882bdc5a232c107d81'-EOF-
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