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Evrytime i run, su - postgres it asks me for a password which I did not set. I simply installed the postgres. I have gone to the pg_hba.conf.

# Database administrative login by Unix domain socket
local   all             postgres                               trust

# TYPE  DATABASE    USER        CIDR-ADDRESS          METHOD

# "local" is for Unix domain socket connections only
local   all         all                               ident
# IPv4 local connections:
host    all         all         127.0.0.1/32          md5
# IPv6 local connections:
host    all         all         ::1/128               md5

I changed the postgres method from ident to trust and then ran sudo /etc/init.d/postgresql restart. Even then it continues to ask for password. i am not sure where am I going wrong?

What should I do?

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2  
The password prompt when running su is done by the operating system not by Postgres. –  a_horse_with_no_name Jun 21 '12 at 21:29
    
so is the password of the operating system?? –  Sam007 Jun 21 '12 at 21:31
    
It is the password of the postgres user in the OS. if you're a sudoer, you can sudo su - postgres. If you're not a sudoer then you probably shouldn't be attempting this anyway. Also, you should revert the changes that you made in you pg_hba.conf file. –  swasheck Jun 21 '12 at 21:33
    
ya i am sudoer and i wish to remove that password of the postgres, for which i changed the method from ident to trust –  Sam007 Jun 21 '12 at 21:40

1 Answer 1

up vote 2 down vote accepted

I was finally able to solve the issue thanks to this site,

http://scratching.psybermonkey.net/2009/06/postgresql-how-to-reset-user-name.html

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