Add antivirus programm

content/docs/computer/pro-audio.md

@@ -4,5 +4,4 @@ date: 2024-06-25T18:52:42+02:00
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 prev: /docs/computer/multimedia-web
 next: /docs/computer/pro-video
-draft: true
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content/docs/computer/utilities-misc.md

@@ -71,6 +71,63 @@ package as follows:
 sudo pacman -Sy speedcrunch
 ```
 
+## Antivirus
+
+> Imagine the information security compliance guideline says you need an antivirus but you run Arch Linux.
+> — <cite>libredefender[^6]</cite>
+
+As the primary reason I'd use an antivirus scan is to prevent that I unintentionally spread such malware[^7] when sharing files with users of Windows[^8] systems, for example. For this reason, I install the [libredefender](https://archlinux.org/packages/?name=libredefender) package to run a malware scan on demand:
+
+```bash
+yay libredefender
+```
+
+To instantly update the malware definitions, I execute:
+
+```bash
+sudo freshclam
+```
+
+Afterwards I can scan a directory such as `~/Downloads` by running:
+
+```bash
+libredefender scan ~/Downloads
+```
+
+In order to prevent libredefender to automatically scan my system on a regular base I create `~/.config/libredefender.toml` containing:
+
+```toml{filename="~/.config/libredefender.toml"}
+[scan]
+## by default libredefender spawns one thread per cpu core
+## set to 1 to use a single thread
+concurrency = 1
+
+excludes = [
+    # may contain virus files for studies
+    "/home/thisven/Downloads/win-malware-to-play-with/*",
+]
+
+skip_hidden = true
+skip_larger_than = "30MiB"
+
+[schedule]
+## manually scan for infections
+automatic_scans = "off"
+#preferred_hours = "09:00:00-17:00:00"
+## Do not run scans when on battery
+skip_on_battery = true
+```
+
+To verfify this new confoguration I can use the command:
+
+```bash
+libredefender dump-config
+```
+
+{{< callout type="info" >}}
+  Read the article on [ClamAV](https://wiki.archlinux.org/title/ClamAV) in the ArchWiki to configure scheduled scans.
+{{< /callout >}}
+
 Proceed with installing and configuring [Office tools](../office-tools) in just
 another guide or go back to the overview and follow instructions for specific
 [use cases](../#use-cases).
@@ -82,4 +139,7 @@ Wikipedia
 [^3]: [NTFS](https://wiki.archlinux.org/title/NTFS-3G) in the ArchWiki
 [^4]: [Vim#DOS/Windows carriage returns](https://wiki.archlinux.org/title/Vim#DOS.2FWindows_carriage_returns) setion in the ArchWiki
 [^5]: [Password manager](https://en.wikipedia.org/wiki/Password_manager) in the
-Wikipedia
+Wikipedia
+[^6]: [libredefender](https://github.com/kpcyrd/libredefender) at GitHub
+[^7]: [Malware](https://en.wikipedia.org/wiki/Malware) in the Wikipedia
+[^8]: [Microsoft's Software is Malware](https://www.gnu.org/proprietary/malware-microsoft.html)