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I know linux system seldom suffer virus , may I know what is the most common or best of Anti Virus software for linux ?
The most common argument for non-windows AV is "protect your windows using friends"
AFAIK Avast has a (paid) linux version of their AV. It is aimed at servers though, and doesn't come too cheap.
The aforementioned ClamAV is another option.
$ apt search clamav
p clamav - anti-virus utility for Unix - command-line
p clamav:i386 - anti-virus utility for Unix - command-line
p clamav-base - anti-virus utility for Unix - base package
p clamav-daemon - anti-virus utility for Unix - scanner daem
p clamav-daemon:i386 - anti-virus utility for Unix - scanner daem
v clamav-data -
v clamav-data:i386 -
p clamav-dbg - debug symbols for ClamAV
p clamav-dbg:i386 - debug symbols for ClamAV
p clamav-docs - anti-virus utility for Unix - documentatio
p clamav-freshclam - anti-virus utility for Unix - virus databa
p clamav-freshclam:i386 - anti-virus utility for Unix - virus databa
p clamav-milter - anti-virus utility for Unix - sendmail int
p clamav-milter:i386 - anti-virus utility for Unix - sendmail int
p clamav-testfiles - anti-virus utility for Unix - test files
p clamav-unofficial-sigs - update script for 3rd-party clamav signatu
p libc-icap-mod-clamav - transitional dummy package
p libclamav-client-perl - Perl client for the ClamAV virus scanner d
p libclamav-dev - anti-virus utility for Unix - development
p libclamav-dev:i386 - anti-virus utility for Unix - development
p libclamav6 - anti-virus utility for Unix - library
p libclamav6:i386 - anti-virus utility for Unix - library
p proftpd-mod-clamav - ProFTPD module mod_clamav
p proftpd-mod-clamav:i386 - ProFTPD module mod_clamav
p python-clamav - Python bindings to ClamAV - transitional p
v python-clamav:i386 -
p python-pyclamav - Python bindings to ClamAV
p python-pyclamav:i386 - Python bindings to ClamAV
I run Clam and Fresh Clam before transferring pictures, images, anything from the net that I personally downloaded.
Before I insert into my facebook account that my family watches. Or my wifes Windows 7 Enterprise laptop that grabs it.
She'll ask, mail me that or give me it on a pen drive.
Cuz you just never know. So I scan that stuff first. Before I share it.
It is just easy peasy to install,update virus definitions, run, and use.
there are many choices you have provided , would advise which of these free software is better ?
I'm not sure if one is necessaryly better than the other:-
However ClamAV and Comodo works.-
BTW if you install Comodo it's a little tricky. The package for Comodo is really 'cav-linux'
ComoDo is dependent upon a library called: libssl0.9.8 so you will need to install that first before installing cav-linux.
Given that there are currently no viruses for Linux in the wild, it's hard to say.
Most vulnerabilities you will encounter using Linux are software vulnerabilities, which are usually quickly patched and often more theoretical than real (that is, they exist, but no one has exploited them), or "social engineering" issues, such as phishing attempts. Even on Linux, I get emails such as the one I received recently telling me that my Bank of America account needed to be "confirmed." I don't have a Bank of America account (and wouldn't have one on a bet, but that's a different issue).
I use AVG myself, but it's mostly because 20 years ago I pledged to myself that I would never connect a computer to the internet unless I had an antivirus program. On Linux, a well-configured firewall is probably more important than an AV program.
There is a Linux Trojan out there that can get into your computer through ssh by cracking your root password. Some distributions install and activate ssh by default, and you may not even be aware that it is running. Be sure to use a strong root password with upper and lower case letters, and even numbers and non-alphabetic characters. Even better configure ssh to ban root logins unless you really need them.