what type of hack? o_o
if site gets Denial of service attack (DDoS) you'll experience or get reports of website downtime
else hacker would change the homepage and say something like "Hacked by <name>"
how can you tell whether the sites been hacked?
not sure but i found a watch-out directory in one of my sites /public_html/
its contains a facebook php code and an images saying Find Out who else has been logging into your account..
anybody knew this?