Windows用户PostgreSQL最新版本(大于10):

到PostgreSQL安装位置，搜索pg_hba.conf，你会在..\postgres\data\pg_hba.conf中找到它。

用记事本打开这个文件，找到这行:

# 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
#..

Change the method from *md5* to *trust*:

# 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
# ...

现在转到你的SQL shell (PSQL)，让一切都为空，

Server [localhost]:
Database [postgres]:
Port [8000]:
Username [postgres]:

这次它不会要求你输入密码，你就可以登录了，

现在运行这一行:

  `ALTER USER yourusername WITH SUPERUSER`

现在您可以将\q留在外壳中。

再次进入“pg_hba.conf”文件，将“METHOD”从“trust”修改为“md5”并保存。

现在使用新用户和密码登录，可以检查\du的属性。

将下面的代码添加到pg_hba.conf文件中。PostgreSQL的安装目录中会出现哪个

hostnossl    all          all            0.0.0.0/0  trust

它将开始工作。

按照步骤1找到最佳答案。

如果你使用Windows操作系统，这是我的补充。只遵循第1步，然后在web上打开pgAdmin或postgres，并单击顶部导航上的file。单击reset layout，最后重新加载应用程序。不管你输入什么密码都可以。我用的是1234。

我没能在C:\Program Files\PostgreSQL\14\ data文件夹中找到pg_hba.conf文件，因为根本没有文件夹数据。

我通过使用pgAdmin创建一个新用户并赋予其超级系统管理员权限来解决这个问题。

Find the file pg_hba.conf. It may be located, for example, in /etc/postgresql-9.1/pg_hba.conf. cd /etc/postgresql-9.1/ Back it up cp pg_hba.conf pg_hba.conf-backup Place the following line (as either the first uncommented line, or as the only one): For all occurrence of below (local and host) , except replication section if you don't have any it has to be changed as follow ,no MD5 or Peer authentication should be present. local all all trust Restart your PostgreSQL server (e.g., on Linux:) sudo /etc/init.d/postgresql restart If the service (daemon) doesn't start reporting in log file: local connections are not supported by this build you should change local all all trust to host all all 127.0.0.1/32 trust You can now connect as any user. Connect as the superuser postgres (note, the superuser name may be different in your installation. In some systems it is called pgsql, for example.) psql -U postgres or psql -h 127.0.0.1 -U postgres (note that with the first command you will not always be connected with local host) Reset the password ('replace my_user_name with postgres since you are resetting the postgres user) ALTER USER my_user_name with password 'my_secure_password'; Restore the old pg_hba.conf file as it is very dangerous to keep around cp pg_hba.conf-backup pg_hba.conf Restart the server, in order to run with the safe pg_hba.conf file sudo /etc/init.d/postgresql restart

关于pg_hba文件的进一步阅读:19.1。pg_hba.conf文件(正式文档)

Edit the file /etc/postgresql/<version>/main/pg_hba.conf and find the following line: local all postgres md5 Edit the line and change md5 at the end to trust and save the file Reload the postgresql service sudo service postgresql reload This will load the configuration files. Now you can modify the postgres user by logging into the psql shell psql -U postgres Update the postgres user's password alter user postgres with password 'secure-passwd-here'; Edit the file /etc/postgresql/<version>/main/pg_hba.conf and change trust back to md5 and save the file Reload the postgresql service sudo service postgresql reload Verify that the password change is working psql -U postgres -W