Raul,
dotLRN uses essentially the same process as OpenACS for installing SSL. AOLserver uses two different configuration files, but they should be quite similar for SSL purposes:
/etc/opeancs/openacs.sh
and
/etc/dotlrn/dotlrn.sh
I have Openacs running on ubuntu 10.10. I'll post notes on the SSL install, once I have it working. Then we can work out any dotLRN specifics.
This may take a few tries for me; I'm used to freebsd.
cheers,
Torben