The free but proprietary Skype is a popular calling option.

This month we’ll show you some popular Linux tools for Internet telephony

Internet telephony does not need to be complicated. You can talk to the world with just Kphone, a normal sound card, and an account with an Internet phone provider.

When you want to call your friends in distant countries, don’t pick up the phone; just put on your headset and fire up Linphone.

An old computer is all you need to build your own do-it-yourself personal phone server.

The pharmers and phishers are after your precious financial infor-mation. We’ll show you how to protect your interests.

The Xen virtualization system is is quickly becoming a standard feature of corporate Linux. We’ll show you how to get started with the latest version of Xen.

Improved resource balancing, central administration, and service consolidation – you can only win with virtualization. Linux Magazine visits a communal data center for a practical look at virtualization in the workplace.