Hello, do you know any linux tools allowing monitoring of files whether any malicious code was injected into them?

So far i found only MalDetect and here is install manual for it:
wget http://www.rfxn.com/downloads/maldetect-current.tar.gz;tar xvzf maldetect-current.tar.gz;cd malde*;pwd;ls;./install.sh
When installed, one can manage it by linux command: maldet
The configuration file is:
vi /usr/local/maldetect/conf.maldet
The script making the Maldet to run daily is in /etc/cron.daily/maldet , you can modiffy scan paths in it
The command to do scan manually is:
maldet --scan-all /home