Where did my program install to?

[Worlds Tallest Engineer]

Hi. I'm trying to install WSUQ&T on Ubuntu 11.04. It requires software that I installed using the "sudo apt-get install".

sudo apt-get install php5
 sudo apt-get install apache2
 sudo apt-get install libapache2-mod-php5  
 sudo apt-get install postgresql

But now there are questions in the terminal that I don't know how to answer.

Specify the desired WSUQ&T file directory (ie. /var/www/html/hwol): 
Enter the directory postgre is installed in (ie. /usr/local/pgsql):

I have "/var/www" but not "/var/www/html/hwol". Should I just make one, and put the files in it?

I have " /usr/local" but not " /usr/local/pgsql". Should I just make one? Where is postgre at? Shouldn't "/usr/local/pgsql" be the default directory?

This software was developed on red hat. Could that cause problems?

[Peter09]

in a terminal you can type

locate <filename>

it will list all files with that name + path

[Worlds Tallest Engineer]

Thanks, this is a really cool tool. But I'm not sure what to do with it. I tried [locate postgre] and I got 847 hits. I tried several other wordings and spelling. However I am yet to figure out where postgre is installed.

So, what should I be looking for?