Thankfully Linux isn’t a platform which has a significant problem with Viruses, however it is always better to be safe than sorry. Luckily ClamAV is an excellent free anti-virus solution for Linux servers. However, at least on RedHat Enterprise 5 (RHEL5) the default install doesn’t offer any automated scanning and alerting

zdroj: http://www.digitalsanctuary.com/tech-blog/debian/automated-clamav-virus-scanning.html