Asan alternative to proprietary antivirus solutions like Symantec AntiVirus (non-free payware) and Avast AntiVirus (non-free freeware), you might consider ClamAV, which is free open source software. You can get it in Ubuntu by installing the clamav package. If you want a GUI for it, you can install clamtk. You can install packages in the Software Center or using apt-get from the command line as others have suggested (as well as other methods).
Its good to install anti-virus if you are dual booting or sometimes scan infected pen drives. The best option will be to use free Bit-defender for Linux. You must be knowing that Bit-defender one of the best or the best.
Go To this link and choose 'Request a Free License (for personal use only)' from left hand side menu. You have to fill a form for license and they will send you a key and location to download anti-virus for your system.
You are required to have a virus scanner installed by the terms of use of the company you work for or are doing business with.To scan files locally, over your network, or going outside your network. For example, via email.Windows viruses may potentially run via Wine.Discovered GNU/Linux malware are mitigated.
Reasons Linux is less prone to malwarePrograms are run as normal user, not root userOpen source -more eyes on the system source codeDiverse system configurationsLess malware actors overall focus on linux. However, proficient malware actors do target linux.
packages from @KevinBerry's question, where he inquired what packages people use in 2021 beyond these; but then his question got closed as a duplicate of this question, so it couldn't garner any answers.
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