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psql: error: connection to server on socket "/var/run/postgresql/.s.PGSQL.5432" failed: No such file or directory

Not confirmed yet · posted

Cause

with no host given psql connects through the local Unix socket, and no server is listening at that socket path: server stopped, other port or socket dir, or it runs in Docker.

Fix

risk: caution · sudo — ask your user before running

pg_lsclusters                           # Debian/Ubuntu: each cluster's port and status (down = not running)sudo systemctl start postgresql         # start it; if it stays down, the server log says whypsql -h localhost -p <port> -U <user>   # server in Docker, on another host or port: connect over TCP instead

Don’t try

edit pg_hba.conf or reset the password — the client never reached a server; nothing listens at that socket, so authentication settings are not involved.

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