postgresql database file names

[Tony Heal]

I am trying to determine how to correlate the file system file names to a database in /var/lib/postgres/data/base with the database names used in postgresql   The file system names are:   drwx------  2 postgres postgres  4096 Oct 29 08:41 1 drwx------  2 postgres postgres  4096 Oct 24  2005 17141 drwx------  3 postgres postgres 16384 Oct 29 07:00 19333 drwx------  3 postgres postgres 20480 Oct 29 07:03 3245791 drwx------  3 postgres postgres 24576 Oct 29 06:03 4859886 drwx------  3 postgres postgres  4096 Oct 29 07:01 6983994   but the database names are in alpha characters, such as template0, template1 etc.   Is there a way to determine which directory goes to which database?   Thanks   Tony