postgresql - 无法启动 PostgreSQL

Question

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

我卸载并安装了 postgresql，但对我没有任何作用。

$ sudo service postgresql start
 * Starting PostgreSQL 10 database server                                                                                                       
 * Failed to issue method call: Unit postgresql@10-main.service failed to load: No such file or directory. See system logs and 'systemctl status postgresql@10-main.service' for details.

systemctl status postgresql 
Failed to issue method call: No such interface 'org.freedesktop.DBus.Properties' on object at path /org/freedesktop/systemd1/unit/postgresql_2eservice

$ psql -V
psql (PostgreSQL) 10.4 (Ubuntu 10.4-2.pgdg14.04+1)

Answer 1

这个问题 /var/run/postgresql/.s.PGSQL.5432 是关于权限的，

您是否更改了数据库目录？如果是，那么您需要向 postgres 授予写入和读取权限

sudo chown -R postgres:postgres <directory_path>

or

sudo chmod -R 777 <directory_path>

如果你不能使用远程访问，在 pg_config 上编辑这一行 listen_addresses = 'localhost' 到 listen_addresses = '*'

并在 pg_hba.conf 中插入这一行:

host    all  all  0.0.0.0/0  md5