10 Linux Antivirus Tools Compared: Free, Open-Source, and Enterprise Options

The article opens by questioning why Linux, often considered secure, still needs antivirus software. It notes that Linux powers over 70% of web servers worldwide, giving attackers strong motivation to create malware targeting these systems. While Linux's default security settings raise the bar, accidental script execution can still infect a system, making automated antivirus monitoring valuable.

Avast Antivirus

Avast is a globally recognized, paid enterprise solution. It offers one of the strongest virus databases in the list, making it a solid investment for server protection. Installation is straightforward: download the package from the official website and run it.

Chkrootkit

Developed by Pangea Informatica, Chkrootkit is a lightweight, portable rootkit detector. It runs easily from the command line, provides fast scans, and can manage and resolve multiple issues in a single pass.

ESET NOD32 Antivirus 4

This paid version is frequently rated as a top choice for Linux/Ubuntu users in independent tests. It features deep malware and spyware detection, network security, and automatic updates for both home and enterprise-grade protection. A free time-limited trial is available for evaluation.

F-PROT

F-PROT, from FRISK Software International, is free and portable. It supports both 32-bit and 64-bit architectures and protects against over 21 million threats and their variants. It scans internal drives and drivers, and detects trojans, macro viruses, and boot-sector viruses.

Panda Cloud Cleaner

Designed for users who dislike persistent background processes, Panda Cloud Cleaner is an on-demand scanner. You download the package, grant execute permission with chmod, run it, and then remove it. This avoids 24×7 resource consumption.

Rootkit Hunter

Originally developed by Michael Boelen, Rootkit Hunter (rkhunter) is a command-line tool that leverages program backdoors and local exploits to detect and remove viruses and trojans. It offers fast rootkit detection, SHA-1 hash comparison for malware identification, and high portability.

ClamAV

ClamAV, developed by Cisco Systems, is a free, open-source antivirus engine available in nearly every Linux distribution's repository. Beginners often prefer the ClamTK graphical front-end, while advanced users favor the command-line interface for finer control. It scans individual files, directories, and entire drives, and provides one of the best malware detection rates among free tools.

Firetools

Firetools is a sandbox GUI application from the creators of the Firejail security sandbox. Unlike traditional scanners, it isolates scripts and applications in a contained environment to verify their safety without risking the host system. It is open-source and works alongside other antivirus scanners for layered defense.

Comodo

Comodo Antivirus, from Comodo Cybersecurity, is free, easy to set up, and provides real-time protection. It supports cross-platform operation on both 32-bit and 64-bit architectures. Features include on-demand scanning, anti-spam, anti-malware tools, and a memory firewall.

Sophos

Sophos Antivirus, developed by the Sophos team, is widely regarded as the best free antivirus for Linux. It offers both on-demand and real-time scanning options. Although Linux-native, it effectively detects and removes viruses targeting other operating systems, making it a lightweight, comprehensive solution.

Source: Reprinted from "Getting Started Station" (入门小站).