Installing and Configuring Clamscan

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ClamAV is an open source (GPL) antivirus engine designed for detecting trojans, viruses, malware and other malicious threats.

To Install ClamAV for Non-cPanel Servers

  1. Install EPEL Repo using the command:

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

    This will create an EPEL Repo file /etc/yum.repos.d/epel.repo.

  2. Install required ClamAV packages.

    yum install clamav clamd

  3. Start the clamd service and set it to auto-start.

    /etc/init.d/clamd on

    chkconfig clamd on

    /etc/init.d/clamd start

  4. Update ClamAV signatures using the command:

    /usr/bin/freshclam

Now, you can configure daily scan as given below:

  1. Create a cron file using the command

    vim /etc/cron.daily/manual_clamscan

  2. Add the following lines in the file /etc/cron.daily/manual_clamscan:

    #!/bin/bash
    SCAN_DIR=”/home”
    LOG_FILE=”/var/log/clamav/manual_clamscan.log”
    /usr/bin/clamscan -i -r $SCAN_DIR >> $LOG_FILE

    Note

    You need to change SCAN_DIR to the directory that you want to scan.

  3. Set executable permission for the cron script using the command:

    chmod +x /etc/cron.daily/manual_clamscan

To Install ClamAV for cPanel Servers

  1. Login to your WHM panel as the root user.

  2. Click the cPanel icon.

  3. Select Manage Plugins. This will bring up a list of additional cPanel modules.

  4. Select the checkbox next to ClamAV Install and Keep Updated.

  5. Submit the settings by clicking Save.

Below are some important options for Clamscan:

  • -h, –help: Print help information and exit

  • -v, –verbose: Be verbose

  • -l FILE, –log=FILE: Save scan report to FILE

  • -f FILE, –file-list=FILE: Scan files listed line by line in FILE

  • -r, –recursive: Scan directories recursively. All the subdirectories in the given directory will be scanned. These options can be used multiple times.

  • -i: Print infected files

  • –remove[=yes/no(*)]: Remove infected files

  • –move=DIRECTORY: Move infected files into DIRECTORY. The directory must be writeable for the user or unprivileged user running clamscan.

  • –copy=DIRECTORY: Copy infected files into DIRECTORY. The directory must be writeable for the user or unprivileged user running clamscan.