====== Anti virus on Linux ======
The general consensus is that anti virus is rarely needed on a Linux home computer:
  * All applications are downloaded through trusted sources
  * Windows is the larger more common target

However, you can also argue:
  * Downloaded documents can also contain malware
  * Linux is more common on servers, malware does exist

===== ClamAV =====
There are not many free and reliable anti viruses. In fact, the only one I know is ClamAV which is an Open Source AV by Cisco Inc.

Search your repository for ''clamav'' (apt, dnf or if you use Bazzite: brew)

It's all command line interface, but there is also a user interface in Flathub: **ClamTk**

===== What to scan =====
Scanning the entire computer is overkill, especially on atomic distros like Bazzite.

Here is a setup that works for me, which will scan new files in the **Downloads**-folder.

  - Create a file called ''scandownload.sh'' somewhere nice
  - Add the contents described below
  - Make it executable with ''chmod +x scandownload.sh''
  - Search KDE settings for Autostart and add it as a login script

The contents of the script is:
<code>
#!/bin/bash
 
#Check for updates
freshclam > /dev/null

#Folder to check
DIR=$HOME/Downloads
 
# Get rid of old log file
rm $HOME/virus-scan.log 2> /dev/null
 
inotifywait -q -m -e close_write,moved_to --format '%w%f' $DIR | while read FILE
do
     # Have to check file length is nonzero otherwise commands may be repeated
     if [ -s $FILE ]; then
          #scan the file and save the log
          clamscan $FILE > $HOME/virus-scan.log

          #check if the log contains text if the scan was OK          
          isok=$(grep -c ': OK' $HOME/virus-scan.log)

          #if it was not OK, show a dialog to warn the user
          if ! [ $isok ]; then
               kdialog --title "Download scan" --msgbox "Virus found!" "$(cat "$HOME/virus-scan.log")"
          fi
     fi
done
</code>
Credit to [[https://fitzcarraldoblog.wordpress.com/2016/02/20/automatically-detecting-files-placed-in-my-downloads-directory-in-gentoo-linux-and-scanning-them-for-viruses/|Fitzcarraldo]]