工作方法,

vi /etc/postgresql/9.3/main/pg_hba.conf 本地所有postgres peer 这里将peer改为trust 重启，sudo服务postgresql重启 现在试试，psql -U postgres

Windows用户:psql -U postgres

然后你应该看到PostgreSQL的命令行界面:postgres=#

遵循以下步骤，它将为你工作:

run msfconsole type db_console some information will be shown to you chose the information who tell you to make: db_connect user:pass@host:port.../database sorry I don't remember it but it's like this one then replace the user and the password and the host and the database with the information included in the database.yml in the emplacement: /usr/share/metasploit-framework/config you will see. rebuilding the model cache in the background. Type apt-get update && apt-get upgrade after the update restart the terminal and lunch msfconsole and it works you can check that by typing in msfconsole: msf>db_status you will see that it's connected.

我把它安装在macOS上，必须:

cd /Applications/Postgres.app/Contents/Versions/9.5/bin
createuser -U postgres -s YOURUSERNAME
createdb YOURUSERNAME

来源如下:https://github.com/PostgresApp/PostgresApp/issues/313#issuecomment-192461641

在本地用户提示符，而不是根用户提示符中键入

sudo -u postgres createuser <local username>

输入本地用户密码。

然后输入前面的命令，生成“角色‘username’不存在”。

以上步骤为我解决了问题。 如果没有，请发送终端消息进行以上步骤。

使用apt-get安装postgres不会创建用户角色或数据库。

创建超级用户角色和个人用户帐户数据库:

Sudo -u postgres createuser -s $(whoami);createdb whoami(美元)