apt-get install clamav clamav-freshclam clamav-daemon 
 
 
vi /etc/clamav/clamd.conf
 
OnAccessMaxFileSize 4000M
OnAccessPrevention yes
OnAccessIncludePath /home/USERNAME/Downloads
OnAccessExcludeUname clamav
 
 
 
vi /etc/systemd/system/antivirus.service
 
[Unit]
Description=Clamonacc Service
After=network.target
 
[Service]
ExecStart=/usr/sbin/clamonacc --remove --fdpass --stream --foreground
User=root
ExecStop=/bin/kill -9 "$MAINPID"
 
[Install]
WantedBy=multi-user.target