maldet is a very popular antivirus for hosting, because it is known to be powerful and also free.
For how to install it, see the following link:
The following is a tutorial on how to use it after installing
to scan files or folders
to perform a scan
# maldet -a /path/to/scan OR
# maldet –scan-all /path/to/scan
to view scanning details
# maldet -e SCAN ID
# maldet –report SCAN ID
to update
# maldet -u OR
# maldet -d
to quarantine previous results
# maldet -q SCAN ID
# maldet –quarantine SCAN ID
to restore files that have been quarantined
# maldet -s FILENAME
# maldet –restore FILENAME
clear previous scan logs
# maldet –clean SCANID
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