Forgot Admin Password on Postgres (Windows Installation), can't reset - windows

I have a Windows PostgreSQL installation.
According to some posts, there is no default password set for the 'postgres' user yet I can't connect using an empty password string.
I'm receiving this exception when I try to connect:
Caused by: org.postgresql.util.PSQLException: FATAL: password authentication failed for user "postgres"
The most relevant tip was this:
https://stackoverflow.com/a/25943227/1005607
Open pg_hba.conf
Change md5 -> TRUST
then restart PgAdmin.
I tried that and restarted PGAdmin but it still asks me for the password when I try to connect:
The task manager in Windows shows some PostgreSQL processes are running. I can't switch them off.
I have tried this and it failed:
pg_ctl restart
ERROR:
pg_ctl: no database directory specified and environment variable PGDATA unset
psql.exe postgres
Password: (none)
ERROR:
psql: fe_sendauth: no password supplied
How can I reset the default password for user 'postgres'?

Based on AK47's answer and some additional info I fixed it by doing the following,
1) Stop Postgres if currently running, command line below. Need to give it the 'data' dir. In my case C:\PostgreSQL\data
pg_ctl -D C:\PostgreSQL\data stop
2) Edit the file pg_hba.conf (it's also in the \data dir) as follows:
As AK40 wrote, change all MD5 references to trust , e.g.
# 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
# Allow replication connections from localhost, by a user with the
# replication privilege.
host replication all 127.0.0.1/32 trust
host replication all ::1/128 trust
3) Now run
psql -U postgres
4) In the PG Command Prompt that appears type,
ALTER USER Postgres WITH PASSWORD '<newpassword>';
5) Save this by typing wq enter to exit the PG Prompt
6) Now start Postgres
pg_ctl -D C:\PostgreSQL\data start
7) Might want to revert the MD5 -> Trust change later in the pg_hba.conf.

Update your pg_hba.conf file to allow for trusted local connections
[root#server] vim pg_hba.conf
>> local all all trust
then restart your PostgreSQL server
[user#machine] pg_ctl -D C:\PostgreSQL\data restart (Windows)
[root#server] service postgresql restart (Linux)
at this point you can connect to your server as postgres user using a local connection without the need to enter a password (omitting the -h parameter when calling the psql command will use a local connection - if you pass -h then this will match the line host all all 0.0.0.0/0 <method> in your pg_hba.conf file)
[root#server] psql -U postgres
You can then alter the postgres user role and set the password to whatever you like using the following command in the psql terminal
[psql] alter role postgres password <new_password>;
Once this is done you can restart your PostgreSQL server again
[user#machine] pg_ctl -D C:\PostgreSQL\data restart (Windows)
[root#server] service postgresql restart (Linux)
and at this point your password should be changed to the new password

I was having the same issue and I couldn't use Postgres in the CLI on my windows machine but I managed to trace down where the passwords were stored via
%APPDATA%\PostgreSQL\pgpass.conf
NB: You must have selected store password option when creating a server or database in the pgAdmin.
I hope this helps. Thanks.

Related

psql SQL STATE[08006] Password Authentication Failed for User. Laravel

This is my first time working with Laravel, and I have a project set up, but I cannot connect to the database I created in Postgres. Whenever I try to connect to the database for a query (or anything), I get this error:
PDOException
SQLSTATE[08006] [7] FATAL: password authentication failed for user "marlie" FATAL: password authentication failed for user "marlie"
I'm using Windows 10, PostgreSQL 11, Laravel 6.0.4. I can connect to the database through pgAdmin4, command line, and psycopg2 without any password authentication issues. Only Laravel is giving me a hard time.
I've tried creating a new Laravel project, creating a new superuser (which I've tested, can successfully access the database from the other programs I mentioned above). I've also tried putting the username and password in both single and double quotes. I tried changing the database name to the OID number value in my postgreSQL file for the database. I've also tried adding the absolute file directory. I've tried changing port from 5432 to 54320. I've also tried other passwords.
Some search results suggested I play with the pg_hba.conf file and adding some lines such as (the indentation here is a little funny, but in the actual file it's all lined up):
local all marlie md5
local all marlie trust
host all all ::1/0 trust
host all all all trust
I've also tried changing everything to trust, in which case I can log in from command line without a password, but Laravel still won't let me! Also, my Windows laptop doesn't seem to support local connections since they're Unix-socket domains, so any local entries in pg_hba.conf end with the file not being able to load at all. Currently, my pg_hba.conf file is back to the default settings.
I've tried logging in by ssh into my Laravel project through Homestead.
$ vagrant ssh
$ psql -d natureFun -U marlie -W
Password:
psql: FATAL: Peer authentication failed for user "marlie"
I thought this was interesting because nowhere in my conf file do I say to use peer authentication. I've only ever tried trust and md5.
This is my .env file from Laravel
DB_CONNECTION=pgsql
DB_HOST=127.0.0.1
DB_PORT=5432
DB_DATABASE=natureFun
DB_USERNAME=marlie
DB_PASSWORD=secret
This is pg_hba.conf
# TYPE DATABASE USER ADDRESS METHOD
# IPv4 local connections:
host all all 127.0.0.1/32 md5
# IPv6 local connections:
host all all 127.0.0.1/32 md5
# Allow replication connections from localhost, by a user with the
# replication privilege.
host replication all 127.0.0.1/32 md5
host replication all ::1/128 md5
It seems that your first pg_hba.conf has a typo:
host all all all trust
Should be:
host all all <ip_address>/<netmask> trust
If it's a dev machine and you don't care about security (for now), just try:
host all all 0.0.0.0/0 trust
Also, unless you're acutally using IPv6, I'd recommend getting rid of the entire line containing ::1/0
Your second pg_hba.conf that you pasted should work, given that you restarted/reloaded the postmaster process -- you can usually do that through pg_ctl reload from the terminal or SELECT pg_reload_conf() from psql
Disclosure: I am an EnterpriseDB (EDB) employee
SOLVED! I misunderstood how Homestead worked (and also failed to mention that I am using it, sorry!)
when I put localhost or 127.0.0.1 in my .env file in my Laravel project, it references the Homestead Virtual as the localhost, NOT my actual computer.
Changing DB_HOST to my computer's IP address solved the problem and I am now happily connected.

How to use psql as postgres (asks for password, but I don't have one)?

I have installed Postgres using HomeBrew and I try to create a new user in it.
I try to use psql to create a new user and database in Postgres, so first I try to open up it by using sudo -u postgres psql, but it prompts me for a password. As far as I know there should be no password for this user by default.
I also tried to edit my pg_hba.conf, but this also seems fine for me:
# "local" is for Unix domain socket connections only
local all all trust
# IPv4 local connections:
host all all 127.0.0.1/32 trust
# IPv6 local connections:
host all all ::1/128 trust
# Allow replication connections from localhost, by a user with the
# replication privilege.
local replication all trust
host replication all 127.0.0.1/32 trust
host replication all ::1/128 trust
Why does it keep prompting me a password (if there is a password what should be it)? If I simply try to run psql to log in using my current system user instead of postgres, and then provide my current user's password, that doesn't work either (I am on macOS by the way).

PostgreSQL: Windows creating new instance but can't login using pgAdmin3

I created new instance for postgesql, but cant login using pgAdmin3
I am using Windows 7 and PostgreSQL 9.5
Here's what i did:
Extract postgresql-9.5.0-1-windows-x64-binaries in D drive
Open cmd (admin account)
create data folder
Use initdb command
use pg_ctl command to logfile start and stop
use pg_ctl register command to register service
edit postgresql.conf
change port from 5432 to 5433
listen_addresses = localhost
listen_addresses = *
edit pg_hba.conf
Add IPv4 local connections
host all all samenet md5
Start the service
Lastly, add Network and local service with full control in Data folder where the new instance created.
------ I did not encounter any problems during this process.
But when I login using pgAdmin3 with postgres account or even admin account, same error occurs.
I don't know what I've missed.
Try changing the authentication method to trust. So you will be able to login without the password.
Add IPv4 local connections
host all all 127.0.0.1/32 trust
In my case I'm allowing all the localhost users to login without password.
If you use md5 client will need a password for authentication, if you use trust client can login without password.

"Unknown Host" - Connecting to PostgreSQL database in SQL Shell (Windows)

I've previously been using PostgreSQL in Ubuntu using:
$sudo -i -u postgres
to access postgres through the terminal to create a role and database. And then able to log in and make changes using:
$sudo -u [dbname] psql
However now I need to use PostgreSQL with LabVIEW so I've had to download PostgreSQL on a Windows PC. I can access the database through Pgadmin and have created a database but when I go into SQL shell it comes up with:
Server [localhost]:
Database [postgres]:
Port [5432]:
Username [postgres]:
I'm not sure if this has anything to do with roles, as I haven't created one for the windows database. But I can't even get past the above to create a role or make any changes in the command prompt.
When I type my computer host name, it says
psql: could not translate host name "Lisa" to address: Unknown host
It says I am connected on PgAdmin and I am able to create databases and tables through the interface, but I can't figure out how to access it in the SQL Shell (psql).
Entered server as localhost IP.
Server [localhost]: 127.0.0.1
Database [localhost]: [dbname]
Port [5432]: 5432
Username [postgres]: [username]

pg_dump access denied under windows

I'm trying to create a backup in postgresql 9.3 on windows 7 in two PC
In PC_A I can do without problems
c:\Program Files\PostgreSQL\9.3\bin>pg_dump -U postgres -C -f C:\uti\sample.bak template1
But in the PC_B say Access is denied
I try modify the pg_hba.conf file and put trust my ip address and restart postgres service.
host all all 127.0.0.1/32 trust
host all all 192.168.0.0/16 trust
I can enter psql ok in PC_B with
psql -U postgres template1
Also I'm running cmd as Administrator
I can create file ok
What else I'm missing?
You only need add C:\Program Files\PostgreSQL\13\bin (postgres path) to PATH in eviroment variables , close the terminal or vscode and check it again , it works for me.

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