createuser: 无法连接到数据库 postgres: 无法连接到服务器: 没有那个文件或目录

createuser: could not connect to database postgres: could not connect to server: No such file or directory

我使用此命令安装了 on

sudo pacman -S postgresql

安装成功。但是当我想创建一个新用户时,像这样:

sudo -iu postgres
[postgres@amirashabani ~]$ createuser amirashabani

我收到此错误:

createuser: could not connect to database postgres: could not connect to server: No such file or directory
Is the server running locally and accepting
connections on Unix domain socket "/run/postgresql/.s.PGSQL.5432"?

我该如何解决这个问题?

问题是我忘记了 startenable service, which was mentioned in the ArchWiki:

Finally, start and enable the postgresql.service.

完成后:

systemctl start postgresql.service
systemctl enable postgresql.service 

一切正常。