ClamAV is a virus scanner for Linux and Unix systems.

To install it on Ubuntu you can use Synaptic or install it from the command line using apt-get.

Once it's installed you can set up a script for right click virus scanning in Nautilus.

To update the virus database, open a terminal and enter the following command:

To automate this update you can set up a cron job. I'll show how to update the virus database every day at 8:57 PM. First, open the terminal and su to root.

Now you need to modify the crontab for the root user.

This opens the root crontab file in the nano text editor. Add the following line to the crontab and then hit Ctrl+X to exit. Answer yes when prompted to save the file.

That's it. ClamAV will now update every day at 8:57 PM. For more information about ClamAV, see the ClamAV User Manual.