psql: could not connect to server: No such file or directory

Solution Verified - Updated -

Issue

  • We are unable to login the PostgreSQL database of Jon server application using the command psql. Tried to login as postgres and root user, but getting the same error. Please see the error details below and guide us fix this error ASAP.
bash-4.3$ psql
psql: could not connect to server: No such file or directory
        Is the server running locally and accepting
        connections on Unix domain socket "/tmp/.s.PGSQL.5432"?

Environment

  • Red Hat Enterprise Linux 6 (RHEL)
  • PostgreSQL database

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