sterndata on "Adding WP to existing LAMP server"

Hi,
We currently have a minimal LAMP install that I use for a simple website. I and want to add WP to this server so there is less to manage and is easier to maintain backups.
I am far from a web expert, but I can figure things out usually.

We would like to access different sites w/ a subdomain or a tab so like
site1.server.local or server.local/site1
site2.server.local or server.local/stie2

Is this something that can be done without having to modify either site?

Thanks

D

Google "Apache Virtual Hosts". Doing a tutorial on apache config is beyond the scope of this forum.