Reset your postgres user password

gistfile1.txt

[ec2-user@ip-10-45-187-20 ~]$ pg_config
BINDIR = /usr/bin
DOCDIR = /usr/share/doc/pgsql
HTMLDIR = /usr/share/doc/pgsql
INCLUDEDIR = /usr/include
PKGINCLUDEDIR = /usr/include/pgsql
INCLUDEDIR-SERVER = /usr/include/pgsql/server
LIBDIR = /usr/lib64
PKGLIBDIR = /usr/lib64/pgsql
LOCALEDIR = /usr/share/locale
MANDIR = /usr/share/man
SHAREDIR = /usr/share/pgsql
SYSCONFDIR = /etc/sysconfig/pgsql
PGXS = /usr/lib64/pgsql/pgxs/src/makefiles/pgxs.mk
CONFIGURE = '--build=x86_64-redhat-linux-gnu' '--host=x86_64-redhat-linux-gnu' '--target=x86_64-amazon-linux-gnu' '--program-prefix=' '--prefix=/usr' '--exec-prefix=/usr' '--bindir=/usr/bin' '--sbindir=/usr/sbin' '--sysconfdir=/etc' '--datadir=/usr/share' '--includedir=/usr/include' '--libdir=/usr/lib64' '--libexecdir=/usr/libexec' '--localstatedir=/var' '--sharedstatedir=/var/lib' '--mandir=/usr/share/man' '--infodir=/usr/share/info' '--disable-rpath' '--with-perl' '--with-tcl' '--with-tclconfig=/usr/lib64' '--with-python' '--with-ldap' '--with-openssl' '--with-pam' '--with-krb5' '--with-gssapi' '--with-ossp-uuid' '--with-libxml' '--with-libxslt' '--enable-nls' '--enable-dtrace' '--with-system-tzdata=/usr/share/zoneinfo' '--sysconfdir=/etc/sysconfig/pgsql' '--datadir=/usr/share/pgsql' 'build_alias=x86_64-redhat-linux-gnu' 'host_alias=x86_64-redhat-linux-gnu' 'target_alias=x86_64-amazon-linux-gnu' 'CFLAGS=-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -DLINUX_OOM_SCORE_ADJ=0'
CC = gcc
CPPFLAGS = -D_GNU_SOURCE -I/usr/include/libxml2
CFLAGS = -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -DLINUX_OOM_SCORE_ADJ=0 -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels -Wmissing-format-attribute -Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard
CFLAGS_SL = -fpic
LDFLAGS = -Wl,--as-needed
LDFLAGS_EX = 
LDFLAGS_SL = 
LIBS = -lpgport -lxslt -lxml2 -lpam -lssl -lcrypto -lkrb5 -lcom_err -lgssapi_krb5 -lz -lreadline -lcrypt -ldl -lm 
VERSION = PostgreSQL 9.2.7


1. In pg_hba.conf, insert or change the below line.
from :
local   all         postgres
to
local   all         postgres                          trust sameuser

2. Restart PostgreSQL services in order for Step 1 changes to take effect :
In Linux,
/etc/init.d/postgresql-8.3 restart
In FreeBSD,
/usr/local/etc/rc.d/postgres restart

3. Login to PostgreSQL on the local machine with the user name "postgres" to change the password :
e.g.
psql -U postgres

4. At the "postgres=#" prompt, change the user name "postgres" password :
e.g.
ALTER USER postgres with password 'secure-password';

5. Quit PostgreSQL interactive session by executing "\q", to exit

6. Alter the configuration (what we did in Step 1) to disable password-less login from local machine to PostgreSQL by changing the word "trust" to "md5" in pg_hba.conf.
e.g.
from:
local   all         postgres                          trust sameuser
to:
local   all         postgres                          md5 sameuser

7. Restart PostgreSQL to make Step 6 changes take effect by repeating Step 2.

8. Re-login to PostgreSQL using the new password by :
psql -U postgres

Voilla !!!