[root@localhost ~]# tail -f /var/lib/pgsql/pgstartup.log

    /usr/bin/postmaster -D /var/lib/pgsql/data
or
    /usr/bin/pg_ctl -D /var/lib/pgsql/data -l logfile start

LOG:  logger shutting down
LOG:  logger shutting down
FATAL:  lock file "/var/lib/pgsql/data/postmaster.pid" already exists
HINT:  Is another postmaster (PID 19018) running in data directory "/var/lib/pgsql/data"?
LOG:  logger shutting down