There is a lot of information at  which will answer most of your questions.
But quickly;
1. No, just change it, the databases will almost certainly be purged when you next run htdig.
2. Yes, pretty much exactly how you suggest.
3. Don't understand your question - are you referring to htsearch or htdig?

From: [] On Behalf Of Mehmet Fatih Akbulut
Sent: Friday, February 24, 2006 4:26 PM
Subject: [htdig] a few more questions ?

hi all,
i have some more questions to ask :
the default start url is this : > start_url:
my questions :
1. if i want to change this start url, do i have to purge the database first ? if yes, how can i purge the existing database ? [with a command or something else ?]
2. am i able to index more than one url ? i mean i want to create search index for,,
if its possible then how i can insert the new urls in htdig.conf ?
should i add at the end of default site and separate them with commas : start_url,,
or should i add like this :
start_url ?
3. what exactly does htdig search ? what is the main criteria ? it just returns the LINKS that contains the word i look for ?
many thanks in advance.