- 29 Aug, 2025
- 0 Comments
- 1 Min Read
psql: could not connect to server: No such file or directory
Error
psql: 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"?
Step 1: Check if PostgreSQL is running
sudo systemctl status postgresql-15
If it’s inactive, you need to start it:
sudo systemctl start postgresql
Step 2: Verify Socket Directory
Check if the socket file exists:
If .s.PGSQL.5432 is missing, PostgreSQL didn’t start properly.
Step 3: Connect via TCP (bypass socket)
psql -h 127.0.0.1 -U postgres
If this works, then the issue is only with the socket path.
Step 4: Check Logs
journalctl -u postgresql
Step 5: Remove Stale PID (if needed)
Conclusion
Tuning PostgreSQL for peak performance is a journey, but with a clear understanding of these configuration parameters, you’re well on your way to becoming a pro! At Learnomate Technologies, we’re here to support you every step of the way with top-notch training in PostgreSQL DBA and more.
For more detailed insights and tutorials, do check out our YouTube channel: www.youtube.com/@learnomate, where we regularly share practical tips and deep dives into essential database topics. And if you’re serious about mastering PostgreSQL DBA, head over to our website for our full training program: learnomate.org/training/postgresql-training/.
I’d love to connect with you, so don’t forget to follow my LinkedIn: https://www.linkedin.com/in/ankushthavali/. If you’re eager to read more about various technologies, explore our blog page here: https://learnomate.org/blogs/. Happy learning, and remember—tuning and training go hand-in-hand for database success!