1. Problem description

when operating PostgreSQL database service, an error message is received: 

Could not connect to server: no such file or directory

2. Solution

PostgreSQL error message “could not connect to server: no such file or directory” it is known that it is caused by the problem of postmaster

the error message indicates that PostgreSQL is not running in the system where the user logs in. When handling this common error, check “postmaster.PID” in the data directory. Ensure that the configuration of PostgreSQL allows TCP/IP connections