Tips from IBM, not all that complicated, but worth looking at.

Other tips include…

• Sharing computers on a Linux (or heterogeneous) network.
• IBM’s top 10 Linux articles and tutorials.
• Miscellaneous tips.
• Linux-powered networking: Part 1, Part 2 and Part 3.
• Industrial-strength Linux box lockdown, a howto: Part 1 and Part 2.
• Introduction to cryptology concepts: Part 1, Part 2 and Part 3.

Note: Some of these links requires registration.