I was advised by someone to download and install this. I tried doing it via Putty, but I got a message saying an incident has been reported? I am very confused, what did I do wrong?
Looking here http://www.rootkit.nl/articles/rootkit_hunter_changelog.html it looks like that software is pretty out of date since the last change was in 2006. It make actually be a backdoor, it was pretty popular back in that day to market a free "security" tool that actually installed what it claimed to eliminate.
It's not a backdoor, but it is badly out of date, and can't be run (at least, by a customer) on a shared hosting server anyway.
Ah, that makes sense. So what CAN I install to increase the security of my website exactly? I use WordPress and it's pretty vulnerable for attacks as it currently is.