[ADMIN] Connection problem

[Muhammad Imran]

Dear All: I'm (was) running the Postgresql 7.3.2 on Linux 8, I had try to create a new instance of psql server with postmaster... and also try to experiement environment variable PGDATA.   But now I have change the environment data to its original location but unable to run '/psql mydb' command, message came 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"? who I can check that postgresql server is running or not.   Regards Imran