I'm running 2 servers (Postfix, Amavis, Sarge howto) and just setup an Ubuntu webserver. What is the proper was to ensure clamav and spamassassin are always up to date? I just noticed no clam-update logs. freshclam gives warning at level 4 out of 10. apt-get install clamav or apt-get update clamav? Anything I should look out for?