Clam AntiVirus

Clam AntiVirus is a free anti-virus software provided since version 0.2.3 of SystemRescueCd. It provides several commands:

• "clamscan -r /path/to/dir". It scan all files of this directory an search for viruses.
• "freshclam". This command updates the virus definitions. Of course, you need to be connected to internet for updating.

Before scanning for virus, you have to update virus definitions. Because this is run from a CDRom, you may have read-only related problems. That's why you have to specify a read-write directory for definitions. Here is how to update definitions and make a scan:

• Step-01. Make empty directories

          # mkdir /virdefs /mnt/testpart
  	# chmod 777 /virdefs
  

• Step-02. Copy the current virus definitions

          # cp /usr/share/clamav/* /virdefs/
  

• Step-03. Download the latest virus definitions

          # freshclam --datadir /virdefs
  

• Step-04. Mount the partition to be scanned

          # mount /dev/hda1 /mnt/testpart
  

• Step-05. Perform the scan on the files.

          # clamscan -r -d /virdefs /mnt/testpart
  

If you really don't have any internet connexion, you can scan for virus without updaing virus definitions. Of course, it's less safe, and only old virus can be detected. Here are the steps:

• Step-01. Make empty directories

          # mkdir /mnt/testpart
  

• Step-02. Mount the partition to be scanned

          # mount /dev/hda1 /mnt/testpart
  

• Step-03. Perform the scan on the files.

          # clamscan -r /mnt/testpart