Tripwire/aide/chkrootkit/rkhunter to name just 4. There's also snort and all those that have strange names like SAINT (which might be SATAN now or vice versa). Just like anti-spyware tools in Windows
You think those are desktop tools (let alone for new users)? How many of those (or KlamAV) do you currently run on your personal desktop today?
but you're unlikely to need them.
Seriously, we need to stop this attitude that Linux is invincible. It isn't.
If there's anything that annoys me more, it would be the impractical pedantry of the occasional zealot.
Peter.