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Official Documentation » Ubuntu 11.10 » Help Ubuntu Desktop Guide » Networking, web, email & chat »

Keeping safe on the internet

Commonly-used network ports — You need to specify the right network port to enable/disable network access for a program with your firewall.Do I need anti-virus software? — There are few Linux viruses, so you probably don't need anti-virus software.Do I need to scan my emails for viruses? — Viruses are unlikely to infect your Linux computer but could infect other people you email.Enabling and blocking firewall access — You can control what programs are accessible by the network.

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