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5 Best Antivirus for Linux Reviews in 2021 | To Protect Your Open Source OS

Top Picks

4 Reviewers

30 Hours of Research

30 Options Considered

Recently, the Linux software community has been growing more in popularity. Although not as well-known as other operating systems like Windows or MacOS, Linux has been proven to be a reliable and useful open-source operating system that powers many different devices from personal computers to servers to mobile devices and beyond. Anyway, before your proceed, you can check out the best Windows 10 antiviruses here, or the ones for MacOS in this post.

Founded by developer Linux Torvalds in 1991, Linux is based on the Unix operating system.  Most of the Linux kernel is written in the C programming language, but also with some other code written in assembly and other programming languages.  If you are worried about web security and safety, you have come to the right place.  At VSS Monitoring, we will help you decide on the best antivirus for Linux.

3 Top Antivirus for Linux

ESET anti virus logo

1. [Best Antivirus for Linux Overall]

 ESET NOD32® Antivirus for Linux Desktop

4.9/5

ESET NOD32 provides essential protection with anti-malware and external storage support.  

ESET NOD32 Antivirus helps to shield your machine with cutting-edge technology using cross-platform protection that stops malware from spreading from your Linux to Windows or Mac machines or vice-versa.

  • Quarantine the files safely
  • Allows you to schedule scanning
  • Blocking ransomware
Bitdefender product

4.8/5

GravityZone Business Security by Bitdefender is consistently ranked #1 in many different independent security tests from independent security test labs.

Linux users can confidently clean their Linux OS system machines when using Bitdefender GravityZone Business Security antivirus. You can also install the antivirus product using the command line.

  •  It provides multi-layer protection against all types of malware 
  • Comes with a fast and secure VPN
  • Its quality justifies its price
kaspersky protection

3. [Best For The Flexible Security Options] Kaspersky Endpoint Security 11 for Linux

4.7/5

Kaspersky is a well-known antivirus company that delivers from the cloud or on-premises.  


Their software provides one of the best flexible security options for mixed environments with a multitude of automated threat defense and systems management.


  • Protects your webcam from hackers

  • It is a lightweight
  • You will get online security for all of your devices such as desktop, android, and iOS devices

Does Linux Need Antivirus?

Although most Linux enthusiasts argue that you usually will NOT need an antivirus on Linux, there are some reasons to consider installing antivirus software for linux.  The bottom line is that installing Linux antivirus software is up to your own comfort level on safety and security.

Viruses that affect Linux systems are considerably less than viruses that affect other computers using Windows and MacOs. For such devices you may need to invest in one of the  best internet security software we reviewed for you, as well. This is mainly attributable to intruding malware's inability to gain control of root access on many Linux machines.  Another reason may be the Linux developer community that patches and updates extremely quickly to most Linux vulnerabilities.

If you are accustomed to Windows or MacOS, then you probably are also used to having antivirus software running in the background of your computer almost all the time.  Antivirus software runs in the background in order to constantly check for computer viruses, malware, ransomware, or other malicious intruders in your computer system and eventually cause problems.

The bottom line is antivirus software for Linux in 2020 is not as common as for Windows or MacOS computer systems given the popularity and commercialization of those major platforms.  Although you probably will not need Linux antivirus software, the rare occasion of a virus infecting your  machine is still a possibility.  Therefore, we suggest that you still install a reliable antivirus software suite on Linux just to be safe.

Best Free Antivirus for Linux?

Because Linux is open-source and there is a large community of developers, the documentation and open resources available with Linux is vast and widespread.  Finding the best antivirus for Linux is simple and easy. Here we provide some of the best antivirus available options to choose from. In addition, for the best free antivirus for Windows or Mac, click here, or check out this article if you need a top antivirus for your business and not using Linux.

We chose Linux antivirus products that provide the best antivirus protection using critical features such as real-time malware detection, antivirus scanner,  anti phishing monitoring, easy to use interface, and other free advanced security protection options to protect your  machine.  Let's take a look at some of the top choices for Linux users.

[Best Antivirus for Linux Overall]

4.9/5

ESET NOD32 provides essential protection with anti-malware and external storage support.    ESET NOD32 Antivirus helps to shield your  machine with cutting-edge technology using cross-platform protection that stops malware from spreading from your Linux to Windows or Mac machines or vice-versa.

ESET anti virus logo

Features:

  • Comprehensive Device Control
  • Enhanced Security Tools
  • SysInspector Scanner Tool
  • Anti Phishing Protection
  • Host Intrusion Prevention System (HIPS)
  • Simple-to-Use Password Manager
  • VPN / Safe Browsing
  • Firewall Protection
  • Gamer Mode
  • Bootable Rescue CD
  • USB Autoscan

With over 110 million protected users worldwide, NOD32 is one of the best  choices as an antivirus scanner.  Virus Bulletin, a leading forum of  computer security industry experts and researchers, have consistently ranked NOD32 is one of the top antivirus software available for Linux machines.  With over 100 prestigious VB100 awards given by Virus Bulletin and 13 global R&D centers around the world, the NOD32 antivirus software has delighted its home users and customers from top industry and corporations to leading universities in academia.

Some major corporate customers of the ESET NOD32 Antivirus software include Mitsubishi Motors, Canon Group, Allianz Suisse and T-Mobile.

Trusted by millions of customers both in large and small-scale enterprises, NOD32 antivirus provides excellent malware detection and real time protection for Linux users.

Another great option about this Linux antivirus product is its ability to have its license transferred from Linux to both Windows or MacOS operating systems.  This provides an enormous amount of value and versatility when switching computers or other machines that may have a different operating system that you are currently using.

ESET NOD 32 not only protects you against all types of malware, including viruses, ransomware, worms, and spyware, but also is full-functioning without draining the full power or other resources of your computer. 

As one of the best Linux antivirus options available in the market, Linux users can trust the NOD32 antivirus suite as a standout product with a simple and easy to use design that provides vital security information and actions in a compact user interface.

Pros

  • Quarantine the files safely
  • Allows you to schedule scanning
  • Blocking ransomware
  • Finds more malware than its competitors

Cons

  • I would like to see a better interface

4.8/5

GravityZone Business Security by Bitdefender is consistently ranked #1 in many different independent security tests from independent security test labs.

6. Bitdefender Total Security software

Features:

  • Layered Endpoint Protection
  • Real-time Protection
  • Antivirus Detection using Artificial and Machine Learning
  • Endpoint Risk Management
  • Mail Gateway Protection from email security threats
  • Malware Detection
  • Network Attack Defense
  • Security Intelligence Cloud
  • Advanced application behavior monitoring
  • Web-based cloud security
  • Multi-Layer Ransomware Protection
  • Vulnerability Assessment
  • Excellent User Interface

Linux users can confidently clean their Linux OS system machines when using Bitdefender GravityZone Business Security antivirus. You can also install the antivirus product using the command line.

Pros

  •  It provides multi-layer protection against all types of malware 
  • Comes with a fast and secure VPN
  • It supports android and iOS devices.
  • Its quality justifies its price

Cons

  • Gives constant notification to use their SafePay Browser

[Best for the Flexible Security Options]

4.7/5

Kaspersky is a well-known antivirus company that delivers from the cloud or on-premises.  Their software provides one of the best flexible security options for mixed environments with a multitude of automated threat defense and systems management.

kaspersky protection

Features:

  • File Threat Protection
  • Web Threat Protection
  • Network Threat Protection
  • Cloud-Based Behavior Detection
  • Easy-to-use Device Control
  • Scheduled Scanning
  • Firewall management
  • Anti-Cryptor (for shared folders)
  • System Integrity Monitoring
  • Containers security
  • Kapersky Security Center Web Console

You can manage the application via web plugin and notifications about managed devices in Kapersky Security plug-ins.  Another great option is to manage connected devices with time and user limitations through Samba Active Directory and Microsoft Active Directory

Pros

  • Protects your webcam from hackers
  • It is a lightweight
  • It comes with a 30-day trial so you can test it
  • You will get online security for all of your devices such as desktop, android, and iOS devices

Cons

  • The basic protection package of Kaspersky lacks advanced features

Sophos's free cutting-edge technology utilizes advanced heuristics to accurately detect malware based on scanning suspicious patterns or signs of malicious intent from certain intruding viruses.  Users can be relieved to learn that the antivirus products deliver some of the best options available for users.

logo of the company sophos

Features:

  • On-demand scanning
  • Real-time scanning
  • Terminal base
  • Cross-platform support
  • Malware Detection
  • Block and remove non-linux threats
  • Advanced Web Security
  • Parental Website Filtering
  • Antivirus Scanner
  • Remote Management
  • Advanced Real-Time Threat Prevention
  • Ransomware Security

Pros

  • Gives a 30-day trial
  • It is easy to use and have a menu that is easily accessible from its dashboard
  • Banking protection
  • Advanced web security

Cons

  • It does not have a quick scan

Comodo Antivirus for Linux (CAVL) is a free comprehensive and complete antivirus protection against viruses, worms, and Trojan horses on Linux OS systems.  It is one of the best antivirus options if you are looking for software that gets the job done.

logo of comodo

Features:

  • Real-time Behavior Analysis
  • Secure Email Gateway
  • Powerful On-Access Scanner
  • Blocks spam mails
  • Advanced Malware Scanner
  • Easy-to-use Application Control
  • Game Mode
  • Sandbox Containment System
  • Isolates suspicious files in quarantine preventing further infection
  • Built-in scheduler to allow to run scans at convenient times for you
  • Comprehensive System Scan of even Configuration files

Linux users generally have great positive reviews for the Comodo Antivirus product suite. The bottom line is that the Comodo Antivirus is a trusted and reliable antivirus product.  You can even utilize the command line interface to install or remove the antivirus as you please as well as customize what options to include features that you really need.

Pros

  • Email, phone, and live chat support
  • One of the most effective sandboxes
  • Fully supports Windows, Mac, and Linux
  • Solid malware protection

Cons

  • Phishing protection is well below average

Is Linux Really Secure?

Although no single operating system can guarantee that it is completely secure, Linux is well-known to be much more reliable than Windows, MacOS or any other operating system because of the rarity of viruses and other malware appearing inside a Linux OS machine .

Many software developers and experts agree with the statistics that show that viruses and malware for Linux users are incredibly low compared to other operating systems.  Since viruses, ransomware, malware, phishing, and other malicious intruders are quite low in Linux, you might wonder if installing an antivirus suite on Linux is even necessary.

The answer is that although the likelihood of getting a virus or other malware onto your Linux system is in fact incredibly low, it is still a great idea to have a reliable antivirus product on your Linux system just to be safe and sure of any vulnerabilities or potential threats.

Luckily, Linux based operating systems have additional security patches that are regularly updated to keep Linux users happy with reliable and safe updates and reminders for patches.  The bottom line is when it comes to safety and security, Linux is a trusted operating system of many advanced users, home users and software developers for both industry professionals and hobbyists alike.  As such, we recommend that you still have a trustworthy antivirus  protection suite for Linux just in case.

What is Ubuntu?

Ubuntu is a Linux distribution based on Debian and mostly composed of free and open-source software. Ubuntu is officially released in three editions: Desktop, Server, and Core for Internet of things devices and robots. All the editions can run on the computer alone, or in a virtual machine.

Ubuntu comes from the African word meaning something like "humanity to others". Ubuntu prides itself in bringing the spirit of Ubuntu to the world of computers and software.

You can also decide to run a 32-bit or 64-bit version of  Ubuntu  on your machine. Ubuntu is dedicated to delivering the world's best free software. Your boot sector will thank you for it!

How Do I Install An Antivirus On Linux?

There are many Linux antivirus  options to choose from.  In explaining how to properly install the antivirus protection on your  machine, we will use Sophos Antivirus for Linux as an example for installation.  Sophos provides Linux users with an easy to use interface for real time protection.  Installation is quick and pain-free on the command line.

Step 1

Go to the antivirus software vendor's website.  In this case, go to the Sophos's company website and download the latest copy of the antivirus suite Make sure to accept Sophos's terms of use and agreement as well as provide an appropriate email address ID and password for free registration.

Step 2

Once the download is complete on your  machine, you can see that the downloaded package comes in a compressed archive file with a file extension like ".tgtz".  It should have a file name such as "sav-linux-free-9.tgz".  Please note that the version number may vary based on the latest version updates and when you download the file.

Launch the "Terminal" window and adjust the console command to point to the "Downloads" directory.  You can navigate to the "Downloads" folder of your  machine using the "ls" and "cd" commands on the command line.

Use the "ls" command to list all directories in the current working directory of  the command line.

Use "cd" to change the directory path to the necessary folder within the directory.

Step 3

Use the "cd" command to go inside directly to the "Downloads" directory.

cd Downloads

Step 4

Use the "ls" command again to see what contents are inside the "Downloads" directory.

Is

Step 5

Next, use the "tar" command to extract the contents of the compressed archive file with the ".tgtz" file extension.  Use the flag "-xvzf" after the "tar" command followed by the downloaded file name to extract the files from archive .

tar - xvzf sav-linux-free-9.tgz

Step 6

Make sure to use the "ls"  command each time you make any changes to the original file such as extracting the files from archive.  This allows you to see inside the extracted content.

Is

Step 7

Next, use the "cd" command to change directory into another folder or sub-directory within the current directory of the extracted contents you have opened.  In this case, use "cd" to change directory into the folder called "sophos-av".

cd sophos-av

Step 8

After that, use the "sudo" command (which is short for "super user do") in order to run the "sh"  installer (short for "root shell") for the extracted contents of the antivirus suite.

sudo sh ./install.sh

Step 9

Once the installer runs, you should see a long text of the legal terms of use agreement for the antivirus suite.  Use the "Enter"/"Return" key  or "Space" bar key  to scroll all the way to the bottom of the agreement text and enter "Y" for "Yes" to confirm and begin the installation of the software to your  machine.

Step 10

Next, a prompt will appear to confirm the destination folder for installing Sophos Antivirus for Linux.  This is usually indicated by a directory folder such as "/opt/sophos-av".  You can simply press the "Enter"/"Return" key  to start the installation of the antivirus installer onto your Linux system.

Where do you want to install Sophos Anti-Virus? [/opt/sophos-av]

Step 11

The next step is to answer if you would like to enable "on-access scanning" or not.  This is an extremely useful feature from Sophos Antivirus which allows for detecting malware in real-time during the file transfer process.  Although it may consume some RAM in the background, the memory expended is minimal and worth the added functionality.

Simply input "[Y]" in the command line to enable on-access scanning.

Do you want to enable on-access scanning? Yes(Y)/No(N) [Y]

Step 12

The following question prompt that appears asks you to choose what type of auto-updating that you prefer to receive.  Either directly from Sophos's company servers or from your own servers.  The last option is to choose "None".  We suggest using Sophos's servers, so input "[s"] in the Terminal to enable auto-updating from Sophos's servers.

Which type of auto-updating do you want? From Sophos(s)/From own server(o)/None(n) [s]

Step 13

The next question asks about which version of the antivirus suite for Linux you would like to install.  You can input "[f"] for the "Free" version of  Sophos Antivirus for Linux.  The other option is inputting "[s]" for the "Supported" version of Sophos Antivirus for Linux.  We suggest inputting "[s]" to install the Supported version for quicker updates and new patches.

Do you wish to install the Free (f) or Supported (s) version of SAV for Linux? [s]

Step 14

Lastly, you can enter proxy info to access any of Sophos's future updates..  A proxy server acts as a firewall and web filter that provides a gateway between users and the internet.  You can enter "[Y]" for "Yes" or  "[N]" for "No".  We suggest entering "[N]" for "No" if you do not need to use a proxy server.

Do you need a proxy to access Sophos updates? Yes(Y)/No(N) [N]

Step 15

Now you are finished! Installation is now complete.  You will see a nice notification message on your command line interface that proudly indicates that your  machine is now safeguarded by Sophos Antivirus. Hurray!

Installation completed.

Your computer is now protected by Sophos Anti-Virus.

What is Rootkit Hunter?

Rootkit Hunter is another free antivirus option for Linux.  Also known as "rkhunter", Rootkit Hunter provides a wide range of options to scan your Linux machine for things such as rootkits, backdoors, and other exploits.

Although the last stable release was in February 2018 for version 1.4.6, Rootkit Hunter is still an incredible open source antivirus solution for your Linux machine.  Rootkit Hunter was released under a GPL (GNU General Public License) for open source development that enables developers to freely study, share, and modify the software.

Rootkit Hunter applies the SHA-1 hashing algorithm for malware discovery and virus scanner.  The SHA-1 hashing algorithm stands for "Secure Hash Algorithm 1" in cryptography.  The subject is a little too advanced for this article today, but rest assured that Rootkit Hunter has an amazingly secure backbone and inner engine at its core system to find and detect malware quickly.

Rootkit Hunter offers a simple to use interface that users can agree make it one of the best free antivirus options out there.  In addition to its user friendly design, Rootkit Hunter goes above and beyond as far as security tools go in order to scan backdoors, rootkits, and local exploits on your systems.  It can scan hidden files, wrong permissions set on binaries, or suspicious strings in kernels.

As you can see, you can customize Rootkit Hunter to detect malware or other unwanted malicious intruders as much as you like when scanning files.  The free open access and open source nature of the software allows you to quickly weed out any infected files and inform you of any warnings of suspicious files.

Conclusion

Finding the best Linux antivirus  suite may sound daunting as Linux is not as widely used as other platforms like Windows or MacOS.  However, the fact is that there actually ARE some of the best free Linux antivirus protection suites still available that are either open source or commercially available.

If you are afraid of malware infecting your Linux machine, you need an antivirus product on Linux that you can reliably count on.  At VSS Monitoring, we scour the Internet for the best options available for users on Linux for antivirus protection.

Another major platform like Windows and MacOS have more malware infections and other problems, we have seen more users move to Linux in 2020.  As a free, open-source operating system, Linux provides users the ability to customize their own settings and builds.

The bottom line is that the simple fact that users face less malware attacks or other security issues on Linux is a reason to consider Linux as an option if you have not already jumped on board.  It may be well worth it!