Hello,all.
 I have installed the postgresql .
 $/usr/local/pgsql/bin/postgres -D /usr/local/pgsql/data
 LOG:database system was shut down at 2011-11-10 15:36:14 CST
 LOG:database system is ready to accept connections
 LOG:autovacuum launcher started
 but when I want to connect to the server at another terminal
 $/usr/local/pgsql/bin/createdb mydb
 createdb:could nto connect to database postgres: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"?
 $/usr/local/pgsql/bin/postgres -D /usr/local/pgsql/data
 FATAL:lock file "postmaster.pid"already exists
 HINT: Is another postmaster(PID 1950)running in data directory 
"/usr/local/pgsql/data"?
 I don't know how to slove this problem,I wish you can tell me the 
reason.Thanks .

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