Unable to connect Postgres using psql while postgres is already running.

Hi Expert,

After restarting PostgreSQL Server, I am unable to connect postgres from putty, I am getting error

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"?

While postgres is already running and also I am able to connect databases from PGAdmin tool but not from command prompt.

Software-postgresql-9.3
Os-Centos

Regards,
Dinesh Chandra
|Database administrator (Oracle/PostgreSQL)| Cyient Ltd. Noida.
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