In search of: libpgsql

[Mauricio]

	Ok, I must be doing something wrong here:  I have installed 
postgresql using apt-get (as in apt-get install postgresql), but when 
I say

ldconfig -v | grep libpgsql
it does not find libpgsql.  How come?  Heck, I put the output of 
ldconfig -v in a file and then searched in it and still ended with 
the same result.  What is going on?