ClamAV is a free, open-source antivirus engine designed for Linux systems. It’s widely used for scanning files and systems for malware, viruses, and threats. In this guide, you'll learn how to install ClamAV, update its virus definitions, and perform scans.

Step 1: Install ClamAV

For Debian/Ubuntu systems, run:
sudo apt update && sudo apt install clamav clamav-daemon -y

Step 2: Update Virus Definitions

Use the freshclam tool:
sudo freshclam
If the service is running, stop it first:
sudo systemctl stop clamav-freshclam

Step 3: Run a Manual Scan

Scan a specific folder:
clamscan -r /path/to/directory
To only show infected files:
clamscan -r --infected /path/to/directory

Step 4: Full System Scan

sudo clamscan -r --infected --bell /
This can take time depending on your system size.

Watch the tutorial:
https://www.youtube.com/watch?v=8-IisHDZHYU

ClamAV is ideal for system admins and developers looking to secure their Linux systems with a reliable open-source antivirus tool.