How useful is anti-virus in Linux?
In almost three years of using Linux, I've never come across any Linux malware. I have come across tales of Linux malware. Do these stories suggest that using anti-virus software is necessary or advantageous?
In December 2009, malware was found inside a screensaver on gnome-look.org. The malware was a "script with elevated privileges designed to perform a DDoS attack as well as keep itself updated via downloads".
The moral of the story was clear: don't install software packages from untrusted sources.
The malware script can be found in the Ubuntu forum post linked to in the story above, so I decided to save the script as a text file and send it to VirusTotal, to see how many if any anti-virus programs detect it. I found that somebody had already done this, a couple of days after the malware was discovered, and that no anti-virus program at VirusTotal had detected the script at that time.
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