With the following commands, you can install maldet effortlessly and stop worrying about the security of your server! Maldet will be setup to auto update and scan the files, just copy and paste this command into the terminal via SSH:
cd /usr/local/src/
wget http://www.rfxn.com/downloads/maldetect-current.tar.gz
tar -xzf maldetect-current.tar.gz
cd maldetect-*
sh ./install.sh
maldet --update-ver
maldet --update