Maldet – It is an efficient Malware Detect virus scanner for Linux. Please follow the below steps to install the maldet on your system.
Go to “/opt” and download the latest “maldet” source and untar it.

cd /opt
wget http://www.rfxn.com/downloads/maldetect-current.tar.gz
tar -xvf maldetect-current.tar.gz
cd maldetect-1.4.2

Install the maldet using the “install.sh” shell script.

./install.sh

Now open a new screen session and scan the whole system by running the below command.

maldet -a /

( Please note that this will take hours to complete depending on the disk usage in your system, which is why we are running it in a screen session. )
You can detach and enter to screen session any time and check the status frequently.
If the scan is complete. You will get a result as shown below.

Linux Malware Detect v1.4.2
(C) 2002-2013, R-fx Networks <proj@r-fx.org>
(C) 2013, Ryan MacDonald <ryan@r-fx.org>
inotifywait (C) 2007, Rohan McGovern <rohan@mcgovern.id.au>
This program may be freely redistributed under the terms of the GNU GPL v2.
maldet(20920): {scan} signatures loaded: 11272 (9404 MD5 / 1868 HEX)
maldet(20920): {scan} building file list for /, this might take awhile...
/usr/bin/find: /proc/20974/task/20974/fdinfo/4: No such file or directory
/usr/bin/find: /proc/20974/fdinfo/4: No such file or directory
maldet(20920): {scan} file list completed, found 271615 files...
maldet(20920): {scan} 271615/271615 files scanned: 12 hits 0 cleaned
maldet(20920): {scan} scan completed on /: files 271615, malware hits 12, cleaned hits 0
maldet(20920): {scan} scan report saved, to view run: maldet --report 051913-1142.20920
maldet(20920): {scan} quarantine is disabled! set quar_hits=1 in conf.maldet or to quarantine results run: maldet -q 051913-1142.20920

From the result, you will get the scan report ID. In this case, the scan report ID is – 051913-1142.20920. Run the below command to view the detailed report.

maldet --report 051913-1142.20920

You can put the infected files to quarantine by running the below command.

maldet -q 051913-1142.20920

( Please note that these files will be removed from your system within 14 days. )
That’s it!! You have completed the maldet scan. Your system is now malware-free.

So that’s how you install maldet in your Linux system.