postgresql錯誤處理

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psql: 無法聯結到伺服器: 沒有那個檔案或目錄
伺服器是否在本地運行並且在 Unix 域通訊端
"/var/run/postgresql/.s.PGSQL.5432"上準備接受聯結?

[email protected]:/$ sudo service postgresql start
Failed to start postgresql.service: Unit postgresql.service is masked.
[email protected]:/$ sudo systemctl unmask postgresql
Removed symlink /etc/systemd/system/postgresql.service.

[email protected]:/$ sudo systemctl restart postgresql
[email protected]:/$ sudo service postgresql start
[email protected]:/$ service postgresql status
● postgresql.service - PostgreSQL RDBMS
Loaded: loaded (/lib/systemd/system/postgresql.service; enabled; vendor preset: enabled)
Active: active (exited) since 三 2017-04-05 23:40:24 CST; 20s ago
Process: 9895 ExecStart=/bin/true (code=exited, status=0/SUCCESS)
Main PID: 9895 (code=exited, status=0/SUCCESS)

4月 05 23:40:24 dongyang-K46CB systemd[1]: Starting PostgreSQL RDBMS...
4月 05 23:40:24 dongyang-K46CB systemd[1]: Started PostgreSQL RDBMS.
4月 05 23:40:37 dongyang-K46CB systemd[1]: Started PostgreSQL RDBMS.

postgresql錯誤處理