How to Install ClamAV Antivirus

Install EPEL repo:

For CentOS 6 32-bit execute command:

rpm -Uvh http://mirror.overthewire.com.au/pub/epel/6/i386/epel-release-6-8.noarch.rpm

For CentOS 6 64-bit execute command:

rpm -Uvh http://download.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm

Install required packages:

yum install clamav clamd

Start the clamd service and set it to auto-start

/etc/init.d/clamd on
chkconfig clamd on
/etc/init.d/clamd start

Update ClamAV's signatures:

/usr/bin/freshclam

Note: ClamAV will update automatically, as part of /etc/cron.daily/freshclam.

Configure daily scan

In this example, we will configure a cronjob to scan the /var/www directory every day. Create cron file:

nano /etc/cron.daily/man_clamscan

Add the following to the file above. Be sure to change SCAN_DIR to the directory that you want to scan:

#!/bin/bash
SCAN_DIR="/var/www"
LOG_FILE="/var/log/clamav/man_clamscan.log"
/usr/bin/clamscan -i -r $SCAN_DIR >> $LOG_FILE

Give our cron script executable permissions:

chmod +x /etc/cron.daily/man_clamscan

That's it.