FATAL: password authentication failed for user "postgres" (postgresql 11 with pgAdmin 4)

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I recently installed Postgresql 11, during the installation, there's no step to put password and username for Postgres. Now in pgAdmin 4, I wanted to connect the database to server and it's asking me to input password, and I haven't put any in the first place. Any one knows what's going on. Thank you!

Postgresql: password authentication failed for user "postgres , FATAL: password authentication failed for user "andym". Messages like this indicate that you contacted the server, and it is willing to talk to you, but not until you� From the docs: By default, when PostgreSQL is installed, a postgres user is also added. The first question many ask is, “What is the default password for the user postgres?” The answer is easy… there isn't a default password. The default authentication mode for PostgreSQL is set to ident – iLuvLogix Mar 7 '19 at 8:17

For Windows variant - I too experienced this nasty bug because of pgAdmin for my Windows x64 install of version 9.2. It left my production paralyzed.

In folder C:\Program Files\PostgreSQL\9.2\data or C:\Program Files (x86)\PostgreSQL\9.x\data, you'll find the pg_hba.conf text file.

Find the following lines:

# TYPE  DATABASE        USER            ADDRESS                 METHOD

# IPv4 local connections:
host    all             all             127.0.0.1/32            md5
# IPv6 local connections:
host    all             all             ::1/128                 md5

and change METHOD md5 to "trust" like this:

# TYPE  DATABASE        USER            ADDRESS                 METHOD

# IPv4 local connections:
host    all             all             127.0.0.1/32            trust
# IPv6 local connections:
host    all             all             ::1/128                 trust

From Windows>Run type "services.msc" and enter find the right PostgreSQL instance and restart it.

Your DB security is now blown wide open! Heed the warning to return it back to md5 after changing the user password expiry time to say year 2099 for all the relevant users.

Documentation: 9.1: Authentication Problems, then I tried to login from the pgadmin, which gave me the same error. I've read here that it might be a password expiry dates bug PostgreSQL user� peer means it will trust the authenticity of UNIX user hence does not prompt for the password. md5 means it will always ask for a password, and validate it after hashing with MD5. Now save the file and restart the Postgres server. sudo service postgresql restart. And that’s it! Try to log in now. sudo -u postgres psql Password: postgres=#

I know this is an old question, but I had the same problem, e.g. no dialog for setting password for Postgres during installation with Postgresql 11.

Instead of doing all the file manipulations suggested in the other answers, I deleted Postgresql 11 and installed Postgresql 12, where I was prompted for setting password during installation.

13.10 - Postgres password authentication fails, I was in same situation. after installation on window machine I was getting below error: C:\Users\xxxxx>psql -U postgres psql: FATAL: password authentication� sudo -u postgres psql postgres=# ALTER USER postgres WITH PASSWORD 'newpassword'; and the output return: "ALTER ROLE" but when I type "python manage.py migrate" I receive always the same error: django.db.utils.OperationalError: FATAL: password authentication failed for user "douglas" settings.py:

Note: CREATE USER is the same as CREATE ROLE except that it implies LOGIN.

$ psql postgres
postgres=# create user postgres with superuser password 'postgres';

psql: FATAL: password authentication failed for user "postgres , psql -U postgres Authentication Problems: https://www.postgresql.org/docs/9.1/ client Duration: 0:35 Posted: May 17, 2019 What If I forgot my Postgres user password? If you forgot your postgres password, you can login without password by changing “md5” to “trust” in pg_hba.conf file and restart the PostgreSQL server. After login, you can ALTER postgres user:

Follow below stepsif you are using pgAdmin4 and facing error in updating password :

1] Open file "pg_hba.conf" and find "IPv4 local connections"

2] See the value under "Method" column, it must be set to "md5" becase you selected it while installing.

3] Make "md5" value blank and save the file. Restart pgAdmin4 application.

4] Now again set the value back to "md5" and input your password in pgAdmin application.

You should be successfully able to do it.

psql: FATAL: password authentication failed for user, Clean system - running postgres without volume or anything defined. 2020-02-14 17:26:38.505 UTC [62] FATAL: password authentication� Fatal error: Uncaught exception 'PDOException' with message 'SQLSTATE[08006] [7] FATAL: Ident authentication failed for user "user "' in xxx.php. Surprisingly I was able to create a connection using the console with the user credentials: $ psql -d db-U user. By the way: I’m always creating PostgreSQL databases and users like this:

Error FATAL: password authentication failed for user "postgres , Unable to change PostgreSQL admin password or log in to PostgreSQL on Plesk : psql: FATAL: Ident authentication failed for user "postgres". Password Authentication: This authentication method will need login user to provide username and password, and this method is effective for both local and remote postgresql database server connection. The password can be saved both in clear-text or md5-encrypted. But we recommed use md5-encrypted. This can make the user account more safety. 2.

psql: FATAL: Ident authentication failed for user , 2- Change postgres user's password. PostgreSQL is provided with a default user named 'postgres'. For this, we will use this role and change its�

FATAL: Peer authentication failed for user (postgres), Also provided a solution if user forgot postgres password. PostgreSQL: password authentication failed for user “postgres” in Ubuntu PostgreSQL Error – FATAL: database role “root” does not exist in Linux � PostgreSQL:�

Comments
  • From the docs: By default, when PostgreSQL is installed, a postgres user is also added. The first question many ask is, "What is the default password for the user postgres?" The answer is easy… there isn't a default password. The default authentication mode for PostgreSQL is set to ident
  • Thank you, can you tell me more about the default authentication mode for PostgreSQL, or any reference I can use. - @iLuvLogix
  • what's your os?
  • Operating System: Windows 10
  • pls see my answer and let me know if you encounter any further issues..
  • @Michelley I'm glad it helped you ;) You may want to upvote and accept my answer for future users who encounter a similar issue ;)
  • I set all the method to 'trust', because whenever I create a new database, the server won't connect. Do you have any suggestions for added security?
  • Anyway, I'll definitely upvote and accept your answer, this will help anyone with the same issue.
  • @Michelley I'm having a meeting right now but I'll reply back to you in an hour regarding that matter..
  • Thank you in advance!
  • What is the significance of md5?
  • I was asked the password and I set it too while installing Postgres 12 but now the password is not being accepted and I get this error psql: error: could not connect to server: FATAL: password authentication failed for user "USER" I am entering the correct password though
  • Unfortunately it didn't work. I wasn't able to input mypassword in pgAdmin application again