title: Unable to start Postgres Server because of permission denied on lock file
body: <p>I restarted my Postgres server but now.
  I checked my "pgstartup.log" log file. This says:</p>
  
  <pre><code>creating system views ... ok
  loading system objects' descriptions ... ok
  creating conversions ... ok
  creating dictionaries ... ok
  setting privileges on built-in objects ... ok
  creating information schema ... ok
  vacuuming database template1 ... ok
  copying template1 to template0 ... ok
  copying template1 to postgres ... ok
  
  Success. You can now start the database server using:
  /usr/bin/postgres -D /var/lib/pgsql/data
  /usr/bin/pg_ctl -D /var/lib/pgsql/data -l logfile start
  
  FATAL:  could not open lock file "/tmp/.s.PGSQL.5432.lock": Permission denied
  FATAL:  could not open lock file "/tmp/.s.PGSQL.5432.lock": Permission denied
  </code></pre>
  
  <p>Do you think deleting <code>/tmp/.s.PGSQL.5432.lock</code> would work ? </p>