安装Postgresql后，我执行了以下步骤。

Open the file pg_hba.conf. For Ubuntu, use for example /etc/postgresql/13/main$ sudo nano pg_hba.conf and change this line at the bottom of the file, it should be the first line of the settings: local all postgres peer to local all postgres trust Side note: If you want to be able to connect with other users as well, you also need to change: local all all peer to local all all md5 If you used nano editor, exit with double Escape, x, y, Enter to save the config file. Restart the server $ sudo service postgresql restart Output: * Restarting PostgreSQL 13 database server Login into psql and set your password $ psql -U postgres db> ALTER USER postgres with password 'your-pass'; Output: ALTER ROLE Side note: If you have other users, they will need a password as well: db> ALTER USER my_user with password 'your-pass'; Then enter: exit Finally change the pg_hba.conf from local all postgres trust to local all postgres md5 Restart the server again $ sudo service postgresql restart Output: * Restarting PostgreSQL 13 database server Login at psql with postgres user After restarting the postgresql server, the postgres user accepts the password that you chose: psql -U postgres Output: Password for user postgres: psql (13.4 (Ubuntu 13.4-1.pgdg20.04+1)) Type "help" for help. And you are in psql: postgres=# Side note: Same now works for my_user if you added the user and password: psql -d YOUR_DB_NAME -U my_user Which will ask you for the new password of my_user.

认证方法详细说明:

信任——任何可以连接到服务器的人都被授权访问数据库

对端-使用客户端操作系统用户名作为数据库用户名访问它。

Md5基于密码的认证

如需进一步参考资料，请点击这里

如果您通过localhost(127.0.0.1)连接，则不应该遇到这个特定问题。我不会对pg_hba.conf做太多的改动，但我会调整你的连接字符串:

psql -U someuser -h 127.0.0.1 database

其中someuser是你连接的用户，database是你的用户有权限连接的数据库。

下面是我在Debian上设置postgres的方法:

http://www.postgresql.org/download/linux/debian/  (Wheezy 7.x)

as root …

    root@www0:~# echo "deb http://apt.postgresql.org/pub/repos/apt/ wheezy-pgdg main" >> /etc/apt/sources.list

    root@www0:~# wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | apt-key add -

    root@www0:~# apt-get update

    root@www0:~# apt-get install postgresql-9.4        

    root@www0:~# su - postgres 

    postgres@www0:~$ createuser --interactive -P someuser
    Enter password for new role:
    Enter it again:
    Shall the new role be a superuser? (y/n) n
    Shall the new role be allowed to create databases? (y/n) y
    Shall the new role be allowed to create more new roles? (y/n) n

    postgres@www0:~$ createdb -O someuser database

    postgres@www0:~$ psql -U someuser -h 127.0.0.1 database

享受吧!

在我的情况下，我甚至无法编辑或查看pg_hba.conf文件的内容。

奏效的方法是:

/etc/postgresql/14/main$ sudo vi pg_hba.conf

具有sudo权限的Vi编辑器。

安装Postgresql后，我执行了以下步骤。

Open the file pg_hba.conf. For Ubuntu, use for example /etc/postgresql/13/main$ sudo nano pg_hba.conf and change this line at the bottom of the file, it should be the first line of the settings: local all postgres peer to local all postgres trust Side note: If you want to be able to connect with other users as well, you also need to change: local all all peer to local all all md5 If you used nano editor, exit with double Escape, x, y, Enter to save the config file. Restart the server $ sudo service postgresql restart Output: * Restarting PostgreSQL 13 database server Login into psql and set your password $ psql -U postgres db> ALTER USER postgres with password 'your-pass'; Output: ALTER ROLE Side note: If you have other users, they will need a password as well: db> ALTER USER my_user with password 'your-pass'; Then enter: exit Finally change the pg_hba.conf from local all postgres trust to local all postgres md5 Restart the server again $ sudo service postgresql restart Output: * Restarting PostgreSQL 13 database server Login at psql with postgres user After restarting the postgresql server, the postgres user accepts the password that you chose: psql -U postgres Output: Password for user postgres: psql (13.4 (Ubuntu 13.4-1.pgdg20.04+1)) Type "help" for help. And you are in psql: postgres=# Side note: Same now works for my_user if you added the user and password: psql -d YOUR_DB_NAME -U my_user Which will ask you for the new password of my_user.

认证方法详细说明:

信任——任何可以连接到服务器的人都被授权访问数据库

对端-使用客户端操作系统用户名作为数据库用户名访问它。

Md5基于密码的认证

如需进一步参考资料，请点击这里

如果你想保持默认配置，但想对一个特定的用户/db连接进行socket md5认证，在“local all/all”行之前添加一个“local”行:

# TYPE  DATABASE     USER         ADDRESS             METHOD

# "local" is for Unix domain socket connections only
local   dbname       username                         md5  # <-- this line
local   all          all                              peer
# IPv4 local connections:
host    all          all          127.0.0.1/32        ident
# IPv6 local connections:
host    all          all          ::1/128             ident

我也有同样的问题。

depa的解决方案是绝对正确的。

只要确保你有一个用户配置使用PostgreSQL。

检查文件:

$ ls /etc/postgresql/9.1/main/pg_hba.conf -l

这个文件的权限应该给你注册psql的用户。

进一步。如果你到现在还好…

按照@depa的指示更新。

i.e.

$ sudo nano /etc/postgresql/9.1/main/pg_hba.conf

然后做出改变。