关于adminer：无法连接到PostgreSQL服务器：致命：用户“postgres”的对等身份验证失败

Unable to connect to PostgreSQL server: FATAL: Peer authentication failed for user “postgres”

如何从adminer访问postgres数据库？

我更改了用户postgres的密码：

1 2	$ sudo -u postgres psql $ postgres=# ALTER USER postgres password 'secret';

结果：

1	ALTER ROLE

但我仍然在adminer上得到这个错误：

1	Unable TO CONNECT TO PostgreSQL server: FATAL: Peer authentication failed FOR USER"postgres"

enter image description here

有什么想法吗？

我有这两个用户：

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postgres=# \du
List OF roles
ROLE name | Attributes | Member OF
-----------+------------------------------------------------------------+-----------
postgres | Superuser, CREATE ROLE, CREATE DB, Replication, Bypass RLS | {}
root | Superuser, CREATE ROLE, CREATE DB | {}

但是当我使用此命令创建用户时，我没有为用户root设置密码：

1	sudo -u postgres createuser --interactive

输出(为什么不要求密码？)：

1 2	Enter name OF ROLE TO ADD: root Shall the NEW ROLE be a superuser? (y/n) y

但我仍然在adminer上得到错误：

1	Unable TO CONNECT TO PostgreSQL server: FATAL: Peer authentication failed FOR USER"root"

编辑：

这是我的pg_hba.conf的一些部分

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sudo nano /etc/postgresql/9.5/main/pg_hba.conf

# TYPE DATABASE USER ADDRESS METHOD

#"local" IS FOR Unix DOMAIN socket connections ONLY
LOCAL ALL ALL peer
# IPv4 LOCAL connections:
host ALL ALL 127.0.0.1/32 md5
# IPv6 LOCAL connections:
host ALL ALL ::1/128 md5
# Allow replication connections FROM localhost, BY a USER WITH the
# replication privilege.
#local replication postgres peer
#host replication postgres 127.0.0.1/32 md5
#host replication postgres ::1/128 md5

我将peer更改为ident：

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# DATABASE administrative login BY Unix DOMAIN socket
LOCAL ALL postgres ident

# TYPE DATABASE USER ADDRESS METHOD

#"local" IS FOR Unix DOMAIN socket connections ONLY
LOCAL ALL ALL ident
# IPv4 LOCAL connections:
host ALL ALL 127.0.0.1/32 md5
# IPv6 LOCAL connections:
host ALL ALL ::1/128 md5
# Allow replication connections FROM localhost, BY a USER WITH the
# replication privilege.
#local replication postgres peer
#host replication postgres 127.0.0.1/32 md5
#host replication postgres ::1/128 md5

然后重新启动我的机器。但仍然没有运气。

从这里得到我的答案：

1	LOCAL ALL postgres md5

然后重启服务：

1	sudo systemctl restart postgresql.service